From 4347c2947834fe7f2edf2b457b2d513454fc6a03 Mon Sep 17 00:00:00 2001
From: Mike Chen <chagel@gmail.com>
Date: Sun, 5 Jul 2009 10:23:30 +0800
Subject: initiliaze git rep

---
 templates/content/js/wmd/wmd.js | 2390 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 2390 insertions(+)
 create mode 100644 templates/content/js/wmd/wmd.js

(limited to 'templates/content/js/wmd/wmd.js')

diff --git a/templates/content/js/wmd/wmd.js b/templates/content/js/wmd/wmd.js
new file mode 100644
index 00000000..d83780d6
--- /dev/null
+++ b/templates/content/js/wmd/wmd.js
@@ -0,0 +1,2390 @@
+var Attacklab = Attacklab || {};
+
+Attacklab.wmdBase = function(){
+
+	// A few handy aliases for readability.
+	var wmd  = top.Attacklab;
+	var doc  = top.document;
+	var re   = top.RegExp;
+	var nav  = top.navigator;
+	
+	// Some namespaces.
+	wmd.Util = {};
+	wmd.Position = {};
+	wmd.Command = {};
+	wmd.Global = {};
+	
+	var util = wmd.Util;
+	var position = wmd.Position;
+	var command = wmd.Command;
+	var global = wmd.Global;
+	
+	
+	// Used to work around some browser bugs where we can't use feature testing.
+	global.isIE 		= /msie/.test(nav.userAgent.toLowerCase());
+	global.isIE_5or6 	= /msie 6/.test(nav.userAgent.toLowerCase()) || /msie 5/.test(nav.userAgent.toLowerCase());
+	global.isIE_7plus 	= global.isIE && !global.isIE_5or6;
+	global.isOpera 		= /opera/.test(nav.userAgent.toLowerCase());
+	global.isKonqueror 	= /konqueror/.test(nav.userAgent.toLowerCase());
+	
+	var toolbar_strong_label = "粗体 <strong> Ctrl-B";
+    var toolbar_emphasis_label = "斜体 <em> Ctrl-I";
+    var toolbar_hyperlink_label = "超链接 <a> Ctrl-L";
+    var toolbar_blockquote_label = "引用 <blockquote> Ctrl-.";
+    var toolbar_code_label = "代码 <pre><code> Ctrl-K";
+    var toolbar_image_label = "图片 <img> Ctrl-G";
+    var toolbar_numbered_label = "数字编号列表 <ol> Ctrl-O";
+    var toolbar_bulleted_label = "项目符号列表 <ul> Ctrl-U";
+    var toolbar_heading_label = "标题 <h1>/<h2> Ctrl-H";
+    var toolbar_horizontal_label = "水平线 <hr> Ctrl-R";
+    var toolbar_undo_label = "撤销 Ctrl-Z";
+    var toolbar_redo_label = "重做 Ctrl-Y";
+    
+	// -------------------------------------------------------------------
+	//  YOUR CHANGES GO HERE
+	//
+	// I've tried to localize the things you are likely to change to 
+	// this area.
+	// -------------------------------------------------------------------
+	
+	// The text that appears on the upper part of the dialog box when
+	// entering links.
+	var imageDialogText = "<p style='margin-top: 0px'><b>输入图片地址</b></p><p>示例：<br />"+
+    "http://www.cnprog.com/images/temp.jpg   \"我的截图\"</p>";
+	var linkDialogText = "<p style='margin-top: 0px'><b>输入Web地址</b></p><p>示例：<br />"+
+        "http://www.cnprog.com/   \"我的网站\"</p>";
+	var uploadImageHTML ="<div>或者上传本地图片：</div>" + 
+        "<input type=\"file\" name=\"file-upload\" id=\"file-upload\" size=\"26\" "+
+        "onchange=\"return ajaxFileUpload($('#image-url'));\"/><br>" + 
+        "<img id=\"loading\" src=\"/content/images/indicator.gif\" style=\"display:none;\"/>";
+    
+	// The default text that appears in the dialog input box when entering
+	// links.
+	var imageDefaultText = "http://";
+	var linkDefaultText = "http://";
+	
+	// The location of your button images relative to the base directory.
+	var imageDirectory = "images/";
+	
+	// Some intervals in ms.  These can be adjusted to reduce the control's load.
+	var previewPollInterval = 500;
+	var pastePollInterval = 100;
+	
+	// The link and title for the help button
+	var helpLink = "http://wmd-editor.com/";
+	var helpHoverTitle = "WMD website";
+	var helpTarget = "_blank";
+	
+	// -------------------------------------------------------------------
+	//  END OF YOUR CHANGES
+	// -------------------------------------------------------------------
+	
+	// A collection of the important regions on the page.
+	// Cached so we don't have to keep traversing the DOM.
+	wmd.PanelCollection = function(){
+		this.buttonBar = doc.getElementById("wmd-button-bar");
+		this.preview = doc.getElementById("previewer");
+		this.output = doc.getElementById("wmd-output");
+		this.input = doc.getElementById("editor");
+	};
+	
+	// This PanelCollection object can't be filled until after the page
+	// has loaded.
+	wmd.panels = undefined;
+	
+	// Internet explorer has problems with CSS sprite buttons that use HTML
+	// lists.  When you click on the background image "button", IE will 
+	// select the non-existent link text and discard the selection in the
+	// textarea.  The solution to this is to cache the textarea selection
+	// on the button's mousedown event and set a flag.  In the part of the
+	// code where we need to grab the selection, we check for the flag
+	// and, if it's set, use the cached area instead of querying the
+	// textarea.
+	//
+	// This ONLY affects Internet Explorer (tested on versions 6, 7
+	// and 8) and ONLY on button clicks.  Keyboard shortcuts work
+	// normally since the focus never leaves the textarea.
+	wmd.ieCachedRange = null;		// cached textarea selection
+	wmd.ieRetardedClick = false;	// flag
+	
+	// Returns true if the DOM element is visible, false if it's hidden.
+	// Checks if display is anything other than none.
+	util.isVisible = function (elem) {
+	
+	    if (window.getComputedStyle) {
+	        // Most browsers
+			return window.getComputedStyle(elem, null).getPropertyValue("display") !== "none";
+		}
+		else if (elem.currentStyle) {
+		    // IE
+			return elem.currentStyle["display"] !== "none";
+		}
+	};
+	
+	
+	// Adds a listener callback to a DOM element which is fired on a specified
+	// event.
+	util.addEvent = function(elem, event, listener){
+		if (elem.attachEvent) {
+			// IE only.  The "on" is mandatory.
+			elem.attachEvent("on" + event, listener);
+		}
+		else {
+			// Other browsers.
+			elem.addEventListener(event, listener, false);
+		}
+	};
+
+	
+	// Removes a listener callback from a DOM element which is fired on a specified
+	// event.
+	util.removeEvent = function(elem, event, listener){
+		if (elem.detachEvent) {
+			// IE only.  The "on" is mandatory.
+			elem.detachEvent("on" + event, listener);
+		}
+		else {
+			// Other browsers.
+			elem.removeEventListener(event, listener, false);
+		}
+	};
+
+	// Converts \r\n and \r to \n.
+	util.fixEolChars = function(text){
+		text = text.replace(/\r\n/g, "\n");
+		text = text.replace(/\r/g, "\n");
+		return text;
+	};
+
+	// Extends a regular expression.  Returns a new RegExp
+	// using pre + regex + post as the expression.
+	// Used in a few functions where we have a base
+	// expression and we want to pre- or append some
+	// conditions to it (e.g. adding "$" to the end).
+	// The flags are unchanged.
+	//
+	// regex is a RegExp, pre and post are strings.
+	util.extendRegExp = function(regex, pre, post){
+		
+		if (pre === null || pre === undefined)
+		{
+			pre = "";
+		}
+		if(post === null || post === undefined)
+		{
+			post = "";
+		}
+		
+		var pattern = regex.toString();
+		var flags;
+		
+		// Replace the flags with empty space and store them.
+		pattern = pattern.replace(/\/([gim]*)$/, "");
+		flags = re.$1;
+		
+		// Remove the slash delimiters on the regular expression.
+		pattern = pattern.replace(/(^\/|\/$)/g, "");
+		pattern = pre + pattern + post;
+		
+		return new re(pattern, flags);
+	}
+
+	
+	// Sets the image for a button passed to the WMD editor.
+	// Returns a new element with the image attached.
+	// Adds several style properties to the image.
+	util.createImage = function(img){
+		
+		var imgPath = imageDirectory + img;
+		
+		var elem = doc.createElement("img");
+		elem.className = "wmd-button";
+		elem.src = imgPath;
+
+		return elem;
+	};
+	
+
+	// This simulates a modal dialog box and asks for the URL when you
+	// click the hyperlink or image buttons.
+	//
+	// text: The html for the input box.
+	// defaultInputText: The default value that appears in the input box.
+	// makeLinkMarkdown: The function which is executed when the prompt is dismissed, either via OK or Cancel
+	util.prompt = function(text, defaultInputText, makeLinkMarkdown){
+	
+		// These variables need to be declared at this level since they are used
+		// in multiple functions.
+		var dialog;			// The dialog box.
+		var background;		// The background beind the dialog box.
+		var input;			// The text box where you enter the hyperlink.
+        var type = 0;
+        // The dialog box type(0: Link, 1: Image)
+        if(arguments.length == 4)
+            type = arguments[3];
+
+		if (defaultInputText === undefined) {
+			defaultInputText = "";
+		}
+		
+		// Used as a keydown event handler. Esc dismisses the prompt.
+		// Key code 27 is ESC.
+		var checkEscape = function(key){
+			var code = (key.charCode || key.keyCode);
+			if (code === 27) {
+				close(true);
+			}
+		};
+		
+		// Dismisses the hyperlink input box.
+		// isCancel is true if we don't care about the input text.
+		// isCancel is false if we are going to keep the text.
+		var close = function(isCancel){
+			util.removeEvent(doc.body, "keydown", checkEscape);
+			var text = input.value;
+
+			if (isCancel){
+				text = null;
+			}
+			else{
+				// Fixes common pasting errors.
+				text = text.replace('http://http://', 'http://');
+				text = text.replace('http://https://', 'https://');
+				text = text.replace('http://ftp://', 'ftp://');
+				
+				if (text.indexOf('http://') === -1 && text.indexOf('ftp://') === -1) {
+					text = 'http://' + text;
+				}
+			}
+			
+			dialog.parentNode.removeChild(dialog);
+			background.parentNode.removeChild(background);
+			makeLinkMarkdown(text);
+			return false;
+		};
+		
+		// Creates the background behind the hyperlink text entry box.
+		// Most of this has been moved to CSS but the div creation and
+		// browser-specific hacks remain here.
+		var createBackground = function(){
+		
+			background = doc.createElement("div");
+			background.className = "wmd-prompt-background";
+			style = background.style;
+			style.position = "absolute";
+			style.top = "0";
+			
+			style.zIndex = "1000";
+			
+			// Some versions of Konqueror don't support transparent colors
+			// so we make the whole window transparent.
+			//
+			// Is this necessary on modern konqueror browsers?
+			if (global.isKonqueror){
+				style.backgroundColor = "transparent";
+			}
+			else if (global.isIE){
+				style.filter = "alpha(opacity=50)";
+			}
+			else {
+				style.opacity = "0.5";
+			}
+			
+			var pageSize = position.getPageSize();
+			style.height = pageSize[1] + "px";
+			
+			if(global.isIE){
+				style.left = doc.documentElement.scrollLeft;
+				style.width = doc.documentElement.clientWidth;
+			}
+			else {
+				style.left = "0";
+				style.width = "100%";
+			}
+			
+			doc.body.appendChild(background);
+		};
+		
+		// Create the text input box form/window.
+		var createDialog = function(){
+		
+			// The main dialog box.
+			dialog = doc.createElement("div");
+			dialog.className = "wmd-prompt-dialog";
+			dialog.style.padding = "10px;";
+			dialog.style.position = "fixed";
+			dialog.style.width = "400px";
+			dialog.style.zIndex = "1001";
+			
+			// The dialog text.
+			var question = doc.createElement("div");
+			question.innerHTML = text;
+			question.style.padding = "5px";
+			dialog.appendChild(question);
+			
+			// The web form container for the text box and buttons.
+			var form = doc.createElement("form");
+			form.onsubmit = function(){ return close(false); };
+			style = form.style;
+			style.padding = "0";
+			style.margin = "0";
+			style.cssFloat = "left";
+			style.width = "100%";
+			style.textAlign = "center";
+			style.position = "relative";
+			dialog.appendChild(form);
+			
+			// The input text box
+			input = doc.createElement("input");
+            if(type == 1)
+                input.id = "image-url";
+			input.type = "text";
+			input.value = defaultInputText;
+			style = input.style;
+			style.display = "block";
+			style.width = "80%";
+			style.marginLeft = style.marginRight = "auto";
+			form.appendChild(input);
+			
+            // The upload file input
+            if(type == 1){
+                var upload = doc.createElement("div");
+    			upload.innerHTML = uploadImageHTML;
+    			upload.style.padding = "5px";
+    			form.appendChild(upload);   
+            }
+            
+			// The ok button
+			var okButton = doc.createElement("input");
+			okButton.type = "button";
+			okButton.onclick = function(){ return close(false); };
+			okButton.value = "OK";
+			style = okButton.style;
+			style.margin = "10px";
+			style.display = "inline";
+			style.width = "7em";
+
+			
+			// The cancel button
+			var cancelButton = doc.createElement("input");
+			cancelButton.type = "button";
+			cancelButton.onclick = function(){ return close(true); };
+			cancelButton.value = "Cancel";
+			style = cancelButton.style;
+			style.margin = "10px";
+			style.display = "inline";
+			style.width = "7em";
+
+			// The order of these buttons is different on macs.
+			if (/mac/.test(nav.platform.toLowerCase())) {
+				form.appendChild(cancelButton);
+				form.appendChild(okButton);
+			}
+			else {
+				form.appendChild(okButton);
+				form.appendChild(cancelButton);
+			}
+
+			util.addEvent(doc.body, "keydown", checkEscape);
+			dialog.style.top = "50%";
+			dialog.style.left = "50%";
+			dialog.style.display = "block";
+			if(global.isIE_5or6){
+				dialog.style.position = "absolute";
+				dialog.style.top = doc.documentElement.scrollTop + 200 + "px";
+				dialog.style.left = "50%";
+			}
+			doc.body.appendChild(dialog);
+			
+			// This has to be done AFTER adding the dialog to the form if you
+			// want it to be centered.
+			dialog.style.marginTop = -(position.getHeight(dialog) / 2) + "px";
+			dialog.style.marginLeft = -(position.getWidth(dialog) / 2) + "px";
+			
+		};
+		
+		createBackground();
+		
+		// Why is this in a zero-length timeout?
+		// Is it working around a browser bug?
+		top.setTimeout(function(){
+		
+			createDialog();
+
+			var defTextLen = defaultInputText.length;
+			if (input.selectionStart !== undefined) {
+				input.selectionStart = 0;
+				input.selectionEnd = defTextLen;
+			}
+			else if (input.createTextRange) {
+				var range = input.createTextRange();
+				range.collapse(false);
+				range.moveStart("character", -defTextLen);
+				range.moveEnd("character", defTextLen);
+				range.select();
+			}
+			
+			input.focus();
+		}, 0);
+	};
+	
+	
+	// UNFINISHED
+	// The assignment in the while loop makes jslint cranky.
+	// I'll change it to a better loop later.
+	position.getTop = function(elem, isInner){
+		var result = elem.offsetTop;
+		if (!isInner) {
+			while (elem = elem.offsetParent) {
+				result += elem.offsetTop;
+			}
+		}
+		return result;
+	};
+	
+	position.getHeight = function (elem) {
+		return elem.offsetHeight || elem.scrollHeight;
+	};
+
+	position.getWidth = function (elem) {
+		return elem.offsetWidth || elem.scrollWidth;
+	};
+
+	position.getPageSize = function(){
+		
+		var scrollWidth, scrollHeight;
+		var innerWidth, innerHeight;
+		
+		// It's not very clear which blocks work with which browsers.
+		if(self.innerHeight && self.scrollMaxY){
+			scrollWidth = doc.body.scrollWidth;
+			scrollHeight = self.innerHeight + self.scrollMaxY;
+		}
+		else if(doc.body.scrollHeight > doc.body.offsetHeight){
+			scrollWidth = doc.body.scrollWidth;
+			scrollHeight = doc.body.scrollHeight;
+		}
+		else{
+			scrollWidth = doc.body.offsetWidth;
+			scrollHeight = doc.body.offsetHeight;
+		}
+		
+		if(self.innerHeight){
+			// Non-IE browser
+			innerWidth = self.innerWidth;
+			innerHeight = self.innerHeight;
+		}
+		else if(doc.documentElement && doc.documentElement.clientHeight){
+			// Some versions of IE (IE 6 w/ a DOCTYPE declaration)
+			innerWidth = doc.documentElement.clientWidth;
+			innerHeight = doc.documentElement.clientHeight;
+		}
+		else if(doc.body){
+			// Other versions of IE
+			innerWidth = doc.body.clientWidth;
+			innerHeight = doc.body.clientHeight;
+		}
+		
+        var maxWidth = Math.max(scrollWidth, innerWidth);
+        var maxHeight = Math.max(scrollHeight, innerHeight);
+        return [maxWidth, maxHeight, innerWidth, innerHeight];
+	};
+	
+	// Watches the input textarea, polling at an interval and runs
+	// a callback function if anything has changed.
+	wmd.inputPoller = function(callback, interval){
+	
+		var pollerObj = this;
+		var inputArea = wmd.panels.input;
+		
+		// Stored start, end and text.  Used to see if there are changes to the input.
+		var lastStart;
+		var lastEnd;
+		var markdown;
+		
+		var killHandle; // Used to cancel monitoring on destruction.
+		// Checks to see if anything has changed in the textarea.
+		// If so, it runs the callback.
+		this.tick = function(){
+		
+			if (!util.isVisible(inputArea)) {
+				return;
+			}
+			
+			// Update the selection start and end, text.
+			if (inputArea.selectionStart || inputArea.selectionStart === 0) {
+				var start = inputArea.selectionStart;
+				var end = inputArea.selectionEnd;
+				if (start != lastStart || end != lastEnd) {
+					lastStart = start;
+					lastEnd = end;
+					
+					if (markdown != inputArea.value) {
+						markdown = inputArea.value;
+						return true;
+					}
+				}
+			}
+			return false;
+		};
+		
+		
+		var doTickCallback = function(){
+		
+			if (!util.isVisible(inputArea)) {
+				return;
+			}
+			
+			// If anything has changed, call the function.
+			if (pollerObj.tick()) {
+				callback();
+			}
+		};
+		
+		// Set how often we poll the textarea for changes.
+		var assignInterval = function(){
+			// previewPollInterval is set at the top of the namespace.
+			killHandle = top.setInterval(doTickCallback, interval);
+		};
+		
+		this.destroy = function(){
+			top.clearInterval(killHandle);
+		};
+		
+		assignInterval();
+	};
+	
+	// Handles pushing and popping TextareaStates for undo/redo commands.
+	// I should rename the stack variables to list.
+	wmd.undoManager = function(callback){
+	
+		var undoObj = this;
+		var undoStack = []; // A stack of undo states
+		var stackPtr = 0; // The index of the current state
+		var mode = "none";
+		var lastState; // The last state
+		var poller;
+		var timer; // The setTimeout handle for cancelling the timer
+		var inputStateObj;
+		
+		// Set the mode for later logic steps.
+		var setMode = function(newMode, noSave){
+		
+			if (mode != newMode) {
+				mode = newMode;
+				if (!noSave) {
+					saveState();
+				}
+			}
+			
+			if (!global.isIE || mode != "moving") {
+				timer = top.setTimeout(refreshState, 1);
+			}
+			else {
+				inputStateObj = null;
+			}
+		};
+		
+		var refreshState = function(){
+			inputStateObj = new wmd.TextareaState();
+			poller.tick();
+			timer = undefined;
+		};
+		
+		this.setCommandMode = function(){
+			mode = "command";
+			saveState();
+			timer = top.setTimeout(refreshState, 0);
+		};
+		
+		this.canUndo = function(){
+			return stackPtr > 1;
+		};
+		
+		this.canRedo = function(){
+			if (undoStack[stackPtr + 1]) {
+				return true;
+			}
+			return false;
+		};
+		
+		// Removes the last state and restores it.
+		this.undo = function(){
+		
+			if (undoObj.canUndo()) {
+				if (lastState) {
+					// What about setting state -1 to null or checking for undefined?
+					lastState.restore();
+					lastState = null;
+				}
+				else {
+					undoStack[stackPtr] = new wmd.TextareaState();
+					undoStack[--stackPtr].restore();
+					
+					if (callback) {
+						callback();
+					}
+				}
+			}
+			
+			mode = "none";
+			wmd.panels.input.focus();
+			refreshState();
+		};
+		
+		// Redo an action.
+		this.redo = function(){
+		
+			if (undoObj.canRedo()) {
+			
+				undoStack[++stackPtr].restore();
+				
+				if (callback) {
+					callback();
+				}
+			}
+			
+			mode = "none";
+			wmd.panels.input.focus();
+			refreshState();
+		};
+		
+		// Push the input area state to the stack.
+		var saveState = function(){
+		
+			var currState = inputStateObj || new wmd.TextareaState();
+			
+			if (!currState) {
+				return false;
+			}
+			if (mode == "moving") {
+				if (!lastState) {
+					lastState = currState;
+				}
+				return;
+			}
+			if (lastState) {
+				if (undoStack[stackPtr - 1].text != lastState.text) {
+					undoStack[stackPtr++] = lastState;
+				}
+				lastState = null;
+			}
+			undoStack[stackPtr++] = currState;
+			undoStack[stackPtr + 1] = null;
+			if (callback) {
+				callback();
+			}
+		};
+		
+		var handleCtrlYZ = function(event){
+		
+			var handled = false;
+			
+			if (event.ctrlKey || event.metaKey) {
+			
+				// IE and Opera do not support charCode.
+				var keyCode = event.charCode || event.keyCode;
+				var keyCodeChar = String.fromCharCode(keyCode);
+				
+				switch (keyCodeChar) {
+				
+					case "y":
+						undoObj.redo();
+						handled = true;
+						break;
+						
+					case "z":
+						if (!event.shiftKey) {
+							undoObj.undo();
+						}
+						else {
+							undoObj.redo();
+						}
+						handled = true;
+						break;
+				}
+			}
+			
+			if (handled) {
+				if (event.preventDefault) {
+					event.preventDefault();
+				}
+				if (top.event) {
+					top.event.returnValue = false;
+				}
+				return;
+			}
+		};
+		
+		// Set the mode depending on what is going on in the input area.
+		var handleModeChange = function(event){
+		
+			if (!event.ctrlKey && !event.metaKey) {
+			
+				var keyCode = event.keyCode;
+				
+				if ((keyCode >= 33 && keyCode <= 40) || (keyCode >= 63232 && keyCode <= 63235)) {
+					// 33 - 40: page up/dn and arrow keys
+					// 63232 - 63235: page up/dn and arrow keys on safari
+					setMode("moving");
+				}
+				else if (keyCode == 8 || keyCode == 46 || keyCode == 127) {
+					// 8: backspace
+					// 46: delete
+					// 127: delete
+					setMode("deleting");
+				}
+				else if (keyCode == 13) {
+					// 13: Enter
+					setMode("newlines");
+				}
+				else if (keyCode == 27) {
+					// 27: escape
+					setMode("escape");
+				}
+				else if ((keyCode < 16 || keyCode > 20) && keyCode != 91) {
+					// 16-20 are shift, etc. 
+					// 91: left window key
+					// I think this might be a little messed up since there are
+					// a lot of nonprinting keys above 20.
+					setMode("typing");
+				}
+			}
+		};
+		
+		var setEventHandlers = function(){
+		
+			util.addEvent(wmd.panels.input, "keypress", function(event){
+				// keyCode 89: y
+				// keyCode 90: z
+				if ((event.ctrlKey || event.metaKey) && (event.keyCode == 89 || event.keyCode == 90)) {
+					event.preventDefault();
+				}
+			});
+			
+			var handlePaste = function(){
+				if (global.isIE || (inputStateObj && inputStateObj.text != wmd.panels.input.value)) {
+					if (timer == undefined) {
+						mode = "paste";
+						saveState();
+						refreshState();
+					}
+				}
+			};
+			
+			// pastePollInterval is specified at the beginning of this namespace.
+			poller = new wmd.inputPoller(handlePaste, pastePollInterval);
+			
+			util.addEvent(wmd.panels.input, "keydown", handleCtrlYZ);
+			util.addEvent(wmd.panels.input, "keydown", handleModeChange);
+			
+			util.addEvent(wmd.panels.input, "mousedown", function(){
+				setMode("moving");
+			});
+			wmd.panels.input.onpaste = handlePaste;
+			wmd.panels.input.ondrop = handlePaste;
+		};
+		
+		var init = function(){
+			setEventHandlers();
+			refreshState();
+			saveState();
+		};
+		
+		this.destroy = function(){
+			if (poller) {
+				poller.destroy();
+			}
+		};
+		
+		init();
+	};
+	
+	// I think my understanding of how the buttons and callbacks are stored in the array is incomplete.
+	wmd.editor = function(previewRefreshCallback){
+	
+		if (!previewRefreshCallback) {
+			previewRefreshCallback = function(){};
+		}
+		
+		var inputBox = wmd.panels.input;
+		
+		var offsetHeight = 0;
+		
+		var editObj = this;
+		
+		var mainDiv;
+		var mainSpan;
+		
+		var div; // This name is pretty ambiguous.  I should rename this.
+		
+		// Used to cancel recurring events from setInterval.
+		var creationHandle;
+		
+		var undoMgr; // The undo manager
+		
+		// Perform the button's action.
+		var doClick = function(button){
+		
+			inputBox.focus();
+			
+			if (button.textOp) {
+				
+				if (undoMgr) {
+					undoMgr.setCommandMode();
+				}
+				
+				var state = new wmd.TextareaState();
+				
+				if (!state) {
+					return;
+				}
+				
+				var chunks = state.getChunks();
+				
+				// Some commands launch a "modal" prompt dialog.  Javascript
+				// can't really make a modal dialog box and the WMD code
+				// will continue to execute while the dialog is displayed.
+				// This prevents the dialog pattern I'm used to and means
+				// I can't do something like this:
+				//
+				// var link = CreateLinkDialog();
+				// makeMarkdownLink(link);
+				// 
+				// Instead of this straightforward method of handling a
+				// dialog I have to pass any code which would execute
+				// after the dialog is dismissed (e.g. link creation)
+				// in a function parameter.
+				//
+				// Yes this is awkward and I think it sucks, but there's
+				// no real workaround.  Only the image and link code
+				// create dialogs and require the function pointers.
+				var fixupInputArea = function(){
+				
+					inputBox.focus();
+					
+					if (chunks) {
+						state.setChunks(chunks);
+					}
+					
+					state.restore();
+					previewRefreshCallback();
+				};
+				
+				var noCleanup = button.textOp(chunks, fixupInputArea);
+				
+				if(!noCleanup) {
+					fixupInputArea();
+				}
+				
+			}
+			
+			if (button.execute) {
+				button.execute(editObj);
+			}
+		};
+			
+		var setUndoRedoButtonStates = function(){
+			if(undoMgr){
+				setupButton(document.getElementById("wmd-undo-button"), undoMgr.canUndo());
+				setupButton(document.getElementById("wmd-redo-button"), undoMgr.canRedo());
+			}
+		};
+		
+		var setupButton = function(button, isEnabled) {
+		
+			var normalYShift = "0px";
+			var disabledYShift = "-20px";
+			var highlightYShift = "-40px";
+			
+			if(isEnabled) {
+				button.style.backgroundPosition = button.XShift + " " + normalYShift;
+				button.onmouseover = function(){
+					this.style.backgroundPosition = this.XShift + " " + highlightYShift;
+				};
+							
+				button.onmouseout = function(){
+					this.style.backgroundPosition = this.XShift + " " + normalYShift;
+				};
+				
+				// IE tries to select the background image "button" text (it's
+				// implemented in a list item) so we have to cache the selection
+				// on mousedown.
+				if(global.isIE) {
+					button.onmousedown =  function() { 
+						wmd.ieRetardedClick = true;
+						wmd.ieCachedRange = document.selection.createRange(); 
+					};
+				}
+				
+				if (!button.isHelp)
+				{
+					button.onclick = function() {
+						if (this.onmouseout) {
+							this.onmouseout();
+						}
+						doClick(this);
+						return false;
+					}
+				}
+			}
+			else {
+				button.style.backgroundPosition = button.XShift + " " + disabledYShift;
+				button.onmouseover = button.onmouseout = button.onclick = function(){};
+			}
+		}
+	
+		var makeSpritedButtonRow = function(){
+		 	
+			var buttonBar = document.getElementById("wmd-button-bar");
+			var normalYShift = "0px";
+			var disabledYShift = "-20px";
+			var highlightYShift = "-40px";
+			
+			var buttonRow = document.createElement("ul");
+			buttonRow.id = "wmd-button-row";
+			buttonRow = buttonBar.appendChild(buttonRow);
+
+			
+			var boldButton = document.createElement("li");
+			boldButton.className = "wmd-button";
+			boldButton.id = "wmd-bold-button";
+			boldButton.title = toolbar_strong_label;
+			boldButton.XShift = "0px";
+			boldButton.textOp = command.doBold;
+			setupButton(boldButton, true);
+			buttonRow.appendChild(boldButton);
+			
+			var italicButton = document.createElement("li");
+			italicButton.className = "wmd-button";
+			italicButton.id = "wmd-italic-button";
+			italicButton.title = toolbar_emphasis_label;
+			italicButton.XShift = "-20px";
+			italicButton.textOp = command.doItalic;
+			setupButton(italicButton, true);
+			buttonRow.appendChild(italicButton);
+
+			var spacer1 = document.createElement("li");
+			spacer1.className = "wmd-spacer";
+			spacer1.id = "wmd-spacer1";
+			buttonRow.appendChild(spacer1); 
+
+			var linkButton = document.createElement("li");
+			linkButton.className = "wmd-button";
+			linkButton.id = "wmd-link-button";
+			linkButton.title = toolbar_hyperlink_label;
+			linkButton.XShift = "-40px";
+			linkButton.textOp = function(chunk, postProcessing){
+				return command.doLinkOrImage(chunk, postProcessing, false);
+			};
+			setupButton(linkButton, true);
+			buttonRow.appendChild(linkButton);
+
+			var quoteButton = document.createElement("li");
+			quoteButton.className = "wmd-button";
+			quoteButton.id = "wmd-quote-button";
+			quoteButton.title = toolbar_blockquote_label;
+			quoteButton.XShift = "-60px";
+			quoteButton.textOp = command.doBlockquote;
+			setupButton(quoteButton, true);
+			buttonRow.appendChild(quoteButton);
+			
+			var codeButton = document.createElement("li");
+			codeButton.className = "wmd-button";
+			codeButton.id = "wmd-code-button";
+			codeButton.title = toolbar_code_label;
+			codeButton.XShift = "-80px";
+			codeButton.textOp = command.doCode;
+			setupButton(codeButton, true);
+			buttonRow.appendChild(codeButton);
+
+			var imageButton = document.createElement("li");
+			imageButton.className = "wmd-button";
+			imageButton.id = "wmd-image-button";
+			imageButton.title = toolbar_image_label;
+			imageButton.XShift = "-100px";
+			imageButton.textOp = function(chunk, postProcessing){
+				return command.doLinkOrImage(chunk, postProcessing, true);
+			};
+			setupButton(imageButton, true);
+			buttonRow.appendChild(imageButton);
+
+			var spacer2 = document.createElement("li");
+			spacer2.className = "wmd-spacer";
+			spacer2.id = "wmd-spacer2";
+			buttonRow.appendChild(spacer2); 
+
+			var olistButton = document.createElement("li");
+			olistButton.className = "wmd-button";
+			olistButton.id = "wmd-olist-button";
+			olistButton.title = toolbar_numbered_label;
+			olistButton.XShift = "-120px";
+			olistButton.textOp = function(chunk, postProcessing){
+				command.doList(chunk, postProcessing, true);
+			};
+			setupButton(olistButton, true);
+			buttonRow.appendChild(olistButton);
+			
+			var ulistButton = document.createElement("li");
+			ulistButton.className = "wmd-button";
+			ulistButton.id = "wmd-ulist-button";
+			ulistButton.title = toolbar_bulleted_label;
+			ulistButton.XShift = "-140px";
+			ulistButton.textOp = function(chunk, postProcessing){
+				command.doList(chunk, postProcessing, false);
+			};
+			setupButton(ulistButton, true);
+			buttonRow.appendChild(ulistButton);
+			
+			var headingButton = document.createElement("li");
+			headingButton.className = "wmd-button";
+			headingButton.id = "wmd-heading-button";
+			headingButton.title = toolbar_heading_label;
+			headingButton.XShift = "-160px";
+			headingButton.textOp = command.doHeading;
+			setupButton(headingButton, true);
+			buttonRow.appendChild(headingButton); 
+			
+			var hrButton = document.createElement("li");
+			hrButton.className = "wmd-button";
+			hrButton.id = "wmd-hr-button";
+			hrButton.title = toolbar_horizontal_label;
+			hrButton.XShift = "-180px";
+			hrButton.textOp = command.doHorizontalRule;
+			setupButton(hrButton, true);
+			buttonRow.appendChild(hrButton); 
+			
+			var spacer3 = document.createElement("li");
+			spacer3.className = "wmd-spacer";
+			spacer3.id = "wmd-spacer3";
+			buttonRow.appendChild(spacer3); 
+			
+			var undoButton = document.createElement("li");
+			undoButton.className = "wmd-button";
+			undoButton.id = "wmd-undo-button";
+			undoButton.title = toolbar_undo_label;
+			undoButton.XShift = "-200px";
+			undoButton.execute = function(manager){
+				manager.undo();
+			};
+			setupButton(undoButton, true);
+			buttonRow.appendChild(undoButton); 
+			
+			var redoButton = document.createElement("li");
+			redoButton.className = "wmd-button";
+			redoButton.id = "wmd-redo-button";
+			redoButton.title = toolbar_redo_label;
+			if (/win/.test(nav.platform.toLowerCase())) {
+				redoButton.title = toolbar_redo_label;
+			}
+			else {
+				// mac and other non-Windows platforms
+				redoButton.title = "重做 - Ctrl+Shift+Z";
+			}
+			redoButton.XShift = "-220px";
+			redoButton.execute = function(manager){
+				manager.redo();
+			};
+			setupButton(redoButton, true);
+			buttonRow.appendChild(redoButton); 
+			/*
+			var helpButton = document.createElement("li");
+			helpButton.className = "wmd-button";
+			helpButton.id = "wmd-help-button";
+			helpButton.XShift = "-240px";
+			helpButton.isHelp = true;
+			
+			var helpAnchor = document.createElement("a");
+			helpAnchor.href = helpLink;
+			helpAnchor.target = helpTarget
+			helpAnchor.title = helpHoverTitle;
+			helpButton.appendChild(helpAnchor);
+			
+			setupButton(helpButton, true);
+			buttonRow.appendChild(helpButton);
+			*/
+			setUndoRedoButtonStates();
+		}
+		
+		var setupEditor = function(){
+		
+			if (/\?noundo/.test(doc.location.href)) {
+				wmd.nativeUndo = true;
+			}
+			
+			if (!wmd.nativeUndo) {
+				undoMgr = new wmd.undoManager(function(){
+					previewRefreshCallback();
+					setUndoRedoButtonStates();
+				});
+			}
+			
+			makeSpritedButtonRow();
+			
+			
+			var keyEvent = "keydown";
+			if (global.isOpera) {
+				keyEvent = "keypress";
+			}
+			
+			util.addEvent(inputBox, keyEvent, function(key){
+				
+				// Check to see if we have a button key and, if so execute the callback.
+				if (key.ctrlKey || key.metaKey) {
+				
+					var keyCode = key.charCode || key.keyCode;
+					var keyCodeStr = String.fromCharCode(keyCode).toLowerCase();
+					
+					// Bugfix for messed up DEL and .
+					if (keyCode === 46) {
+						keyCodeStr = "";
+					}
+					if (keyCode === 190) {
+						keyCodeStr = ".";
+					}
+					
+					switch(keyCodeStr) {
+						case "b":
+							doClick(document.getElementById("wmd-bold-button"));
+							break;
+						case "i":
+							doClick(document.getElementById("wmd-italic-button"));
+							break;
+						case "l":
+							doClick(document.getElementById("wmd-link-button"));
+							break;
+						case ".":
+							doClick(document.getElementById("wmd-quote-button"));
+							break;
+						case "k":
+							doClick(document.getElementById("wmd-code-button"));
+							break;
+						case "g":
+							doClick(document.getElementById("wmd-image-button"));
+							break;
+						case "o":
+							doClick(document.getElementById("wmd-olist-button"));
+							break;
+						case "u":
+							doClick(document.getElementById("wmd-ulist-button"));
+							break;
+						case "h":
+							doClick(document.getElementById("wmd-heading-button"));
+							break;
+						case "r":
+							doClick(document.getElementById("wmd-hr-button"));
+							break;
+						case "y":
+							doClick(document.getElementById("wmd-redo-button"));
+							break;
+						case "z":
+							if(key.shiftKey) {
+								doClick(document.getElementById("wmd-redo-button"));
+							}
+							else {
+								doClick(document.getElementById("wmd-undo-button"));
+							}
+							break;
+						default:
+							return;
+					}
+					
+
+					if (key.preventDefault) {
+						key.preventDefault();
+					}
+					
+					if (top.event) {
+						top.event.returnValue = false;
+					}
+				}
+			});
+			
+			// Auto-indent on shift-enter
+			util.addEvent(inputBox, "keyup", function(key){
+				if (key.shiftKey && !key.ctrlKey && !key.metaKey) {
+					var keyCode = key.charCode || key.keyCode;
+					// Character 13 is Enter
+					if (keyCode === 13) {
+						fakeButton = {};
+						fakeButton.textOp = command.doAutoindent;
+						doClick(fakeButton);
+					}
+				}
+			});
+			
+			if (inputBox.form) {
+				var submitCallback = inputBox.form.onsubmit;
+				inputBox.form.onsubmit = function(){
+					convertToHtml();
+					if (submitCallback) {
+						return submitCallback.apply(this, arguments);
+					}
+				};
+			}
+		};
+		
+		// Convert the contents of the input textarea to HTML in the output/preview panels.
+		var convertToHtml = function(){
+		
+			if (wmd.showdown) {
+				var markdownConverter = new wmd.showdown.converter();
+			}
+			var text = inputBox.value;
+			
+			var callback = function(){
+				inputBox.value = text;
+			};
+			
+			if (!/markdown/.test(wmd.wmd_env.output.toLowerCase())) {
+				if (markdownConverter) {
+					inputBox.value = markdownConverter.makeHtml(text);
+					top.setTimeout(callback, 0);
+				}
+			}
+			return true;
+		};
+		
+		
+		this.undo = function(){
+			if (undoMgr) {
+				undoMgr.undo();
+			}
+		};
+		
+		this.redo = function(){
+			if (undoMgr) {
+				undoMgr.redo();
+			}
+		};
+		
+		// This is pretty useless.  The setupEditor function contents
+		// should just be copied here.
+		var init = function(){
+			setupEditor();
+		};
+		
+		this.destroy = function(){
+			if (undoMgr) {
+				undoMgr.destroy();
+			}
+			if (div.parentNode) {
+				div.parentNode.removeChild(div);
+			}
+			if (inputBox) {
+				inputBox.style.marginTop = "";
+			}
+			top.clearInterval(creationHandle);
+		};
+		
+		init();
+	};
+	
+	// The input textarea state/contents.
+	// This is used to implement undo/redo by the undo manager.
+	wmd.TextareaState = function(){
+	
+		// Aliases
+		var stateObj = this;
+		var inputArea = wmd.panels.input;
+		
+		this.init = function() {
+		
+			if (!util.isVisible(inputArea)) {
+				return;
+			}
+				
+			this.setInputAreaSelectionStartEnd();
+			this.scrollTop = inputArea.scrollTop;
+			if (!this.text && inputArea.selectionStart || inputArea.selectionStart === 0) {
+				this.text = inputArea.value;
+			}
+			
+		}
+		
+		// Sets the selected text in the input box after we've performed an
+		// operation.
+		this.setInputAreaSelection = function(){
+		
+			if (!util.isVisible(inputArea)) {
+				return;
+			}
+			
+			if (inputArea.selectionStart !== undefined && !global.isOpera) {
+			
+				inputArea.focus();
+				inputArea.selectionStart = stateObj.start;
+				inputArea.selectionEnd = stateObj.end;
+				inputArea.scrollTop = stateObj.scrollTop;
+			}
+			else if (doc.selection) {
+				
+				if (doc.activeElement && doc.activeElement !== inputArea) {
+					return;
+				}
+					
+				inputArea.focus();
+				var range = inputArea.createTextRange();
+				range.moveStart("character", -inputArea.value.length);
+				range.moveEnd("character", -inputArea.value.length);
+				range.moveEnd("character", stateObj.end);
+				range.moveStart("character", stateObj.start);
+				range.select();
+			}
+		};
+		
+		this.setInputAreaSelectionStartEnd = function(){
+		
+			if (inputArea.selectionStart || inputArea.selectionStart === 0) {
+			
+				stateObj.start = inputArea.selectionStart;
+				stateObj.end = inputArea.selectionEnd;
+			}
+			else if (doc.selection) {
+				
+				stateObj.text = util.fixEolChars(inputArea.value);
+				
+				// IE loses the selection in the textarea when buttons are
+				// clicked.  On IE we cache the selection and set a flag
+				// which we check for here.
+				var range;
+				if(wmd.ieRetardedClick && wmd.ieCachedRange) {
+					range = wmd.ieCachedRange;
+					wmd.ieRetardedClick = false;
+				}
+				else {
+					range = doc.selection.createRange();
+				}
+
+				var fixedRange = util.fixEolChars(range.text);
+				var marker = "\x07";
+				var markedRange = marker + fixedRange + marker;
+				range.text = markedRange;
+				var inputText = util.fixEolChars(inputArea.value);
+					
+				range.moveStart("character", -markedRange.length);
+				range.text = fixedRange;
+
+				stateObj.start = inputText.indexOf(marker);
+				stateObj.end = inputText.lastIndexOf(marker) - marker.length;
+					
+				var len = stateObj.text.length - util.fixEolChars(inputArea.value).length;
+					
+				if (len) {
+					range.moveStart("character", -fixedRange.length);
+					while (len--) {
+						fixedRange += "\n";
+						stateObj.end += 1;
+					}
+					range.text = fixedRange;
+				}
+					
+				this.setInputAreaSelection();
+			}
+		};
+		
+		// Restore this state into the input area.
+		this.restore = function(){
+		
+			if (stateObj.text != undefined && stateObj.text != inputArea.value) {
+				inputArea.value = stateObj.text;
+			}
+			this.setInputAreaSelection();
+			inputArea.scrollTop = stateObj.scrollTop;
+		};
+		
+		// Gets a collection of HTML chunks from the inptut textarea.
+		this.getChunks = function(){
+		
+			var chunk = new wmd.Chunks();
+			
+			chunk.before = util.fixEolChars(stateObj.text.substring(0, stateObj.start));
+			chunk.startTag = "";
+			chunk.selection = util.fixEolChars(stateObj.text.substring(stateObj.start, stateObj.end));
+			chunk.endTag = "";
+			chunk.after = util.fixEolChars(stateObj.text.substring(stateObj.end));
+			chunk.scrollTop = stateObj.scrollTop;
+			
+			return chunk;
+		};
+		
+		// Sets the TextareaState properties given a chunk of markdown.
+		this.setChunks = function(chunk){
+		
+			chunk.before = chunk.before + chunk.startTag;
+			chunk.after = chunk.endTag + chunk.after;
+			
+			if (global.isOpera) {
+				chunk.before = chunk.before.replace(/\n/g, "\r\n");
+				chunk.selection = chunk.selection.replace(/\n/g, "\r\n");
+				chunk.after = chunk.after.replace(/\n/g, "\r\n");
+			}
+			
+			this.start = chunk.before.length;
+			this.end = chunk.before.length + chunk.selection.length;
+			this.text = chunk.before + chunk.selection + chunk.after;
+			this.scrollTop = chunk.scrollTop;
+		};
+
+		this.init();
+	};
+	
+	// before: contains all the text in the input box BEFORE the selection.
+	// after: contains all the text in the input box AFTER the selection.
+	wmd.Chunks = function(){
+	};
+	
+	// startRegex: a regular expression to find the start tag
+	// endRegex: a regular expresssion to find the end tag
+	wmd.Chunks.prototype.findTags = function(startRegex, endRegex){
+	
+		var chunkObj = this;
+		var regex;
+		
+		if (startRegex) {
+			
+			regex = util.extendRegExp(startRegex, "", "$");
+			
+			this.before = this.before.replace(regex, 
+				function(match){
+					chunkObj.startTag = chunkObj.startTag + match;
+					return "";
+				});
+			
+			regex = util.extendRegExp(startRegex, "^", "");
+			
+			this.selection = this.selection.replace(regex, 
+				function(match){
+					chunkObj.startTag = chunkObj.startTag + match;
+					return "";
+				});
+		}
+		
+		if (endRegex) {
+			
+			regex = util.extendRegExp(endRegex, "", "$");
+			
+			this.selection = this.selection.replace(regex,
+				function(match){
+					chunkObj.endTag = match + chunkObj.endTag;
+					return "";
+				});
+
+			regex = util.extendRegExp(endRegex, "^", "");
+			
+			this.after = this.after.replace(regex,
+				function(match){
+					chunkObj.endTag = match + chunkObj.endTag;
+					return "";
+				});
+		}
+	};
+	
+	// If remove is false, the whitespace is transferred
+	// to the before/after regions.
+	//
+	// If remove is true, the whitespace disappears.
+	wmd.Chunks.prototype.trimWhitespace = function(remove){
+	
+		this.selection = this.selection.replace(/^(\s*)/, "");
+		
+		if (!remove) {
+			this.before += re.$1;
+		}
+		
+		this.selection = this.selection.replace(/(\s*)$/, "");
+		
+		if (!remove) {
+			this.after = re.$1 + this.after;
+		}
+	};
+	
+	
+	wmd.Chunks.prototype.skipLines = function(nLinesBefore, nLinesAfter, findExtraNewlines){
+	
+		if (nLinesBefore === undefined) {
+			nLinesBefore = 1;
+		}
+		
+		if (nLinesAfter === undefined) {
+			nLinesAfter = 1;
+		}
+		
+		nLinesBefore++;
+		nLinesAfter++;
+		
+		var regexText;
+		var replacementText;
+		
+		this.selection = this.selection.replace(/(^\n*)/, "");
+		this.startTag = this.startTag + re.$1;
+		this.selection = this.selection.replace(/(\n*$)/, "");
+		this.endTag = this.endTag + re.$1;
+		this.startTag = this.startTag.replace(/(^\n*)/, "");
+		this.before = this.before + re.$1;
+		this.endTag = this.endTag.replace(/(\n*$)/, "");
+		this.after = this.after + re.$1;
+		
+		if (this.before) {
+		
+			regexText = replacementText = "";
+			
+			while (nLinesBefore--) {
+				regexText += "\\n?";
+				replacementText += "\n";
+			}
+			
+			if (findExtraNewlines) {
+				regexText = "\\n*";
+			}
+			this.before = this.before.replace(new re(regexText + "$", ""), replacementText);
+		}
+		
+		if (this.after) {
+		
+			regexText = replacementText = "";
+			
+			while (nLinesAfter--) {
+				regexText += "\\n?";
+				replacementText += "\n";
+			}
+			if (findExtraNewlines) {
+				regexText = "\\n*";
+			}
+			
+			this.after = this.after.replace(new re(regexText, ""), replacementText);
+		}
+	};
+	
+	// The markdown symbols - 4 spaces = code, > = blockquote, etc.
+	command.prefixes = "(?:\\s{4,}|\\s*>|\\s*-\\s+|\\s*\\d+\\.|=|\\+|-|_|\\*|#|\\s*\\[[^\n]]+\\]:)";
+	
+	// Remove markdown symbols from the chunk selection.
+	command.unwrap = function(chunk){
+		var txt = new re("([^\\n])\\n(?!(\\n|" + command.prefixes + "))", "g");
+		chunk.selection = chunk.selection.replace(txt, "$1 $2");
+	};
+	
+	command.wrap = function(chunk, len){
+		command.unwrap(chunk);
+		var regex = new re("(.{1," + len + "})( +|$\\n?)", "gm");
+		
+		chunk.selection = chunk.selection.replace(regex, function(line, marked){
+			if (new re("^" + command.prefixes, "").test(line)) {
+				return line;
+			}
+			return marked + "\n";
+		});
+		
+		chunk.selection = chunk.selection.replace(/\s+$/, "");
+	};
+	
+	command.doBold = function(chunk, postProcessing){
+		return command.doBorI(chunk, postProcessing, 2, "strong text");
+	};
+	
+	command.doItalic = function(chunk, postProcessing){
+		return command.doBorI(chunk, postProcessing, 1, "emphasized text");
+	};
+	
+	// chunk: The selected region that will be enclosed with */**
+	// nStars: 1 for italics, 2 for bold
+	// insertText: If you just click the button without highlighting text, this gets inserted
+	command.doBorI = function(chunk, postProcessing, nStars, insertText){
+	
+		// Get rid of whitespace and fixup newlines.
+		chunk.trimWhitespace();
+		chunk.selection = chunk.selection.replace(/\n{2,}/g, "\n");
+		
+		// Look for stars before and after.  Is the chunk already marked up?
+		chunk.before.search(/(\**$)/);
+		var starsBefore = re.$1;
+		
+		chunk.after.search(/(^\**)/);
+		var starsAfter = re.$1;
+		
+		var prevStars = Math.min(starsBefore.length, starsAfter.length);
+		
+		// Remove stars if we have to since the button acts as a toggle.
+		if ((prevStars >= nStars) && (prevStars != 2 || nStars != 1)) {
+			chunk.before = chunk.before.replace(re("[*]{" + nStars + "}$", ""), "");
+			chunk.after = chunk.after.replace(re("^[*]{" + nStars + "}", ""), "");
+		}
+		else if (!chunk.selection && starsAfter) {
+			// It's not really clear why this code is necessary.  It just moves
+			// some arbitrary stuff around.
+			chunk.after = chunk.after.replace(/^([*_]*)/, "");
+			chunk.before = chunk.before.replace(/(\s?)$/, "");
+			var whitespace = re.$1;
+			chunk.before = chunk.before + starsAfter + whitespace;
+		}
+		else {
+		
+			// In most cases, if you don't have any selected text and click the button
+			// you'll get a selected, marked up region with the default text inserted.
+			if (!chunk.selection && !starsAfter) {
+				chunk.selection = insertText;
+			}
+			
+			// Add the true markup.
+			var markup = nStars <= 1 ? "*" : "**"; // shouldn't the test be = ?
+			chunk.before = chunk.before + markup;
+			chunk.after = markup + chunk.after;
+		}
+		
+		return;
+	};
+	
+	command.stripLinkDefs = function(text, defsToAdd){
+	
+		text = text.replace(/^[ ]{0,3}\[(\d+)\]:[ \t]*\n?[ \t]*<?(\S+?)>?[ \t]*\n?[ \t]*(?:(\n*)["(](.+?)[")][ \t]*)?(?:\n+|$)/gm, 
+			function(totalMatch, id, link, newlines, title){	
+				defsToAdd[id] = totalMatch.replace(/\s*$/, "");
+				if (newlines) {
+					// Strip the title and return that separately.
+					defsToAdd[id] = totalMatch.replace(/["(](.+?)[")]$/, "");
+					return newlines + title;
+				}
+				return "";
+			});
+		
+		return text;
+	};
+	
+	command.addLinkDef = function(chunk, linkDef){
+	
+		var refNumber = 0; // The current reference number
+		var defsToAdd = {}; //
+		// Start with a clean slate by removing all previous link definitions.
+		chunk.before = command.stripLinkDefs(chunk.before, defsToAdd);
+		chunk.selection = command.stripLinkDefs(chunk.selection, defsToAdd);
+		chunk.after = command.stripLinkDefs(chunk.after, defsToAdd);
+		
+		var defs = "";
+		var regex = /(\[(?:\[[^\]]*\]|[^\[\]])*\][ ]?(?:\n[ ]*)?\[)(\d+)(\])/g;
+		
+		var addDefNumber = function(def){
+			refNumber++;
+			def = def.replace(/^[ ]{0,3}\[(\d+)\]:/, "  [" + refNumber + "]:");
+			defs += "\n" + def;
+		};
+		
+		var getLink = function(wholeMatch, link, id, end){
+		
+			if (defsToAdd[id]) {
+				addDefNumber(defsToAdd[id]);
+				return link + refNumber + end;
+				
+			}
+			return wholeMatch;
+		};
+		
+		chunk.before = chunk.before.replace(regex, getLink);
+		
+		if (linkDef) {
+			addDefNumber(linkDef);
+		}
+		else {
+			chunk.selection = chunk.selection.replace(regex, getLink);
+		}
+		
+		var refOut = refNumber;
+		
+		chunk.after = chunk.after.replace(regex, getLink);
+		
+		if (chunk.after) {
+			chunk.after = chunk.after.replace(/\n*$/, "");
+		}
+		if (!chunk.after) {
+			chunk.selection = chunk.selection.replace(/\n*$/, "");
+		}
+		
+		chunk.after += "\n\n" + defs;
+		
+		return refOut;
+	};
+	
+	command.doLinkOrImage = function(chunk, postProcessing, isImage){
+	
+		chunk.trimWhitespace();
+		chunk.findTags(/\s*!?\[/, /\][ ]?(?:\n[ ]*)?(\[.*?\])?/);
+		
+		if (chunk.endTag.length > 1) {
+		
+			chunk.startTag = chunk.startTag.replace(/!?\[/, "");
+			chunk.endTag = "";
+			command.addLinkDef(chunk, null);
+			
+		}
+		else {
+		
+			if (/\n\n/.test(chunk.selection)) {
+				command.addLinkDef(chunk, null);
+				return;
+			}
+			
+			// The function to be executed when you enter a link and press OK or Cancel.
+			// Marks up the link and adds the ref.
+			var makeLinkMarkdown = function(link){
+			
+				if (link !== null) {
+				
+					chunk.startTag = chunk.endTag = "";
+					var linkDef = " [999]: " + link;
+					
+					var num = command.addLinkDef(chunk, linkDef);
+					chunk.startTag = isImage ? "![" : "[";
+					chunk.endTag = "][" + num + "]";
+					
+					if (!chunk.selection) {
+						if (isImage) {
+							chunk.selection = "alt text";
+						}
+						else {
+							chunk.selection = "link text";
+						}
+					}
+				}
+				postProcessing();
+			};
+			
+			if (isImage) {
+                // add forth param to identify image window
+				util.prompt(imageDialogText, imageDefaultText, makeLinkMarkdown, 1);
+			}
+			else {
+				util.prompt(linkDialogText, linkDefaultText, makeLinkMarkdown);
+			}
+			return true;
+		}
+	};
+	
+	util.makeAPI = function(){
+		wmd.wmd = {};
+		wmd.wmd.editor = wmd.editor;
+		wmd.wmd.previewManager = wmd.previewManager;
+	};
+	
+	util.startEditor = function(){
+	
+		if (wmd.wmd_env.autostart === false) {
+			util.makeAPI();
+			return;
+		}
+
+		var edit;		// The editor (buttons + input + outputs) - the main object.
+		var previewMgr;	// The preview manager.
+		
+		// Fired after the page has fully loaded.
+		var loadListener = function(){
+		
+			wmd.panels = new wmd.PanelCollection();
+			
+			previewMgr = new wmd.previewManager();
+			var previewRefreshCallback = previewMgr.refresh;
+						
+			edit = new wmd.editor(previewRefreshCallback);
+			
+			previewMgr.refresh(true);
+			
+		};
+		
+		util.addEvent(top, "load", loadListener);
+	};
+	
+	wmd.previewManager = function(){
+		
+		var managerObj = this;
+		var converter;
+		var poller;
+		var timeout;
+		var elapsedTime;
+		var oldInputText;
+		var htmlOut;
+		var maxDelay = 3000;
+		var startType = "delayed"; // The other legal value is "manual"
+		
+		// Adds event listeners to elements and creates the input poller.
+		var setupEvents = function(inputElem, listener){
+		
+			util.addEvent(inputElem, "input", listener);
+			inputElem.onpaste = listener;
+			inputElem.ondrop = listener;
+			
+			util.addEvent(inputElem, "keypress", listener);
+			util.addEvent(inputElem, "keydown", listener);
+			// previewPollInterval is set at the top of this file.
+			poller = new wmd.inputPoller(listener, previewPollInterval);
+		};
+		
+		var getDocScrollTop = function(){
+		
+			var result = 0;
+			
+			if (top.innerHeight) {
+				result = top.pageYOffset;
+			}
+			else 
+				if (doc.documentElement && doc.documentElement.scrollTop) {
+					result = doc.documentElement.scrollTop;
+				}
+				else 
+					if (doc.body) {
+						result = doc.body.scrollTop;
+					}
+			
+			return result;
+		};
+		
+		var makePreviewHtml = function(){
+		
+			// If there are no registered preview and output panels
+			// there is nothing to do.
+			if (!wmd.panels.preview && !wmd.panels.output) {
+				return;
+			}
+			
+			var text = wmd.panels.input.value;
+			if (text && text == oldInputText) {
+				return; // Input text hasn't changed.
+			}
+			else {
+				oldInputText = text;
+			}
+			
+			var prevTime = new Date().getTime();
+			
+			if (!converter && wmd.showdown) {
+				converter = new wmd.showdown.converter();
+			}
+			
+			if (converter) {
+				text = converter.makeHtml(text);
+			}
+			
+			// Calculate the processing time of the HTML creation.
+			// It's used as the delay time in the event listener.
+			var currTime = new Date().getTime();
+			elapsedTime = currTime - prevTime;
+			
+			pushPreviewHtml(text);
+			htmlOut = text;
+		};
+		
+		// setTimeout is already used.  Used as an event listener.
+		var applyTimeout = function(){
+		
+			if (timeout) {
+				top.clearTimeout(timeout);
+				timeout = undefined;
+			}
+			
+			if (startType !== "manual") {
+			
+				var delay = 0;
+				
+				if (startType === "delayed") {
+					delay = elapsedTime;
+				}
+				
+				if (delay > maxDelay) {
+					delay = maxDelay;
+				}
+				timeout = top.setTimeout(makePreviewHtml, delay);
+			}
+		};
+		
+		var getScaleFactor = function(panel){
+			if (panel.scrollHeight <= panel.clientHeight) {
+				return 1;
+			}
+			return panel.scrollTop / (panel.scrollHeight - panel.clientHeight);
+		};
+		
+		var setPanelScrollTops = function(){
+		
+			if (wmd.panels.preview) {
+				wmd.panels.preview.scrollTop = (wmd.panels.preview.scrollHeight - wmd.panels.preview.clientHeight) * getScaleFactor(wmd.panels.preview);
+				;
+			}
+			
+			if (wmd.panels.output) {
+				wmd.panels.output.scrollTop = (wmd.panels.output.scrollHeight - wmd.panels.output.clientHeight) * getScaleFactor(wmd.panels.output);
+				;
+			}
+		};
+		
+		this.refresh = function(requiresRefresh){
+		
+			if (requiresRefresh) {
+				oldInputText = "";
+				makePreviewHtml();
+			}
+			else {
+				applyTimeout();
+			}
+		};
+		
+		this.processingTime = function(){
+			return elapsedTime;
+		};
+		
+		// The output HTML
+		this.output = function(){
+			return htmlOut;
+		};
+		
+		// The mode can be "manual" or "delayed"
+		this.setUpdateMode = function(mode){
+			startType = mode;
+			managerObj.refresh();
+		};
+		
+		var isFirstTimeFilled = true;
+		
+		var pushPreviewHtml = function(text){
+		
+			var emptyTop = position.getTop(wmd.panels.input) - getDocScrollTop();
+			
+			// Send the encoded HTML to the output textarea/div.
+			if (wmd.panels.output) {
+				// The value property is only defined if the output is a textarea.
+				if (wmd.panels.output.value !== undefined) {
+					wmd.panels.output.value = text;
+					wmd.panels.output.readOnly = true;
+				}
+				// Otherwise we are just replacing the text in a div.
+				// Send the HTML wrapped in <pre><code>
+				else {
+					var newText = text.replace(/&/g, "&amp;");
+					newText = newText.replace(/</g, "&lt;");
+					wmd.panels.output.innerHTML = "<pre><code>" + newText + "</code></pre>";
+				}
+			}
+			
+			if (wmd.panels.preview) {
+				wmd.panels.preview.innerHTML = text;
+			}
+			
+			setPanelScrollTops();
+			
+			if (isFirstTimeFilled) {
+				isFirstTimeFilled = false;
+				return;
+			}
+			
+			var fullTop = position.getTop(wmd.panels.input) - getDocScrollTop();
+			
+			if (global.isIE) {
+				top.setTimeout(function(){
+					top.scrollBy(0, fullTop - emptyTop);
+				}, 0);
+			}
+			else {
+				top.scrollBy(0, fullTop - emptyTop);
+			}
+		};
+		
+		var init = function(){
+		
+			setupEvents(wmd.panels.input, applyTimeout);
+			makePreviewHtml();
+			
+			if (wmd.panels.preview) {
+				wmd.panels.preview.scrollTop = 0;
+			}
+			if (wmd.panels.output) {
+				wmd.panels.output.scrollTop = 0;
+			}
+		};
+		
+		this.destroy = function(){
+			if (poller) {
+				poller.destroy();
+			}
+		};
+		
+		init();
+	};
+
+	// When making a list, hitting shift-enter will put your cursor on the next line
+	// at the current indent level.
+	command.doAutoindent = function(chunk, postProcessing){
+		
+		chunk.before = chunk.before.replace(/(\n|^)[ ]{0,3}([*+-]|\d+[.])[ \t]*\n$/, "\n\n");
+		chunk.before = chunk.before.replace(/(\n|^)[ ]{0,3}>[ \t]*\n$/, "\n\n");
+		chunk.before = chunk.before.replace(/(\n|^)[ \t]+\n$/, "\n\n");
+		
+		if(/(\n|^)[ ]{0,3}([*+-]|\d+[.])[ \t]+.*\n$/.test(chunk.before)){
+			if(command.doList){
+				command.doList(chunk);
+			}
+		}
+		if(/(\n|^)[ ]{0,3}>[ \t]+.*\n$/.test(chunk.before)){
+			if(command.doBlockquote){
+				command.doBlockquote(chunk);
+			}
+		}
+		if(/(\n|^)(\t|[ ]{4,}).*\n$/.test(chunk.before)){
+			if(command.doCode){
+				command.doCode(chunk);
+			}
+		}
+	};
+	
+	command.doBlockquote = function(chunk, postProcessing){
+		
+		chunk.selection = chunk.selection.replace(/^(\n*)([^\r]+?)(\n*)$/,
+			function(totalMatch, newlinesBefore, text, newlinesAfter){
+				chunk.before += newlinesBefore;
+				chunk.after = newlinesAfter + chunk.after;
+				return text;
+			});
+			
+		chunk.before = chunk.before.replace(/(>[ \t]*)$/,
+			function(totalMatch, blankLine){
+				chunk.selection = blankLine + chunk.selection;
+				return "";
+			});
+			
+		chunk.selection = chunk.selection.replace(/^(\s|>)+$/ ,"");
+		chunk.selection = chunk.selection || "Blockquote";
+		
+		if(chunk.before){
+			chunk.before = chunk.before.replace(/\n?$/,"\n");
+		}
+		if(chunk.after){
+			chunk.after = chunk.after.replace(/^\n?/,"\n");
+		}
+		
+		chunk.before = chunk.before.replace(/(((\n|^)(\n[ \t]*)*>(.+\n)*.*)+(\n[ \t]*)*$)/,
+			function(totalMatch){
+				chunk.startTag = totalMatch;
+				return "";
+			});
+			
+		chunk.after = chunk.after.replace(/^(((\n|^)(\n[ \t]*)*>(.+\n)*.*)+(\n[ \t]*)*)/,
+			function(totalMatch){
+				chunk.endTag = totalMatch;
+				return "";
+			});
+		
+		var replaceBlanksInTags = function(useBracket){
+			
+			var replacement = useBracket ? "> " : "";
+			
+			if(chunk.startTag){
+				chunk.startTag = chunk.startTag.replace(/\n((>|\s)*)\n$/,
+					function(totalMatch, markdown){
+						return "\n" + markdown.replace(/^[ ]{0,3}>?[ \t]*$/gm, replacement) + "\n";
+					});
+			}
+			if(chunk.endTag){
+				chunk.endTag = chunk.endTag.replace(/^\n((>|\s)*)\n/,
+					function(totalMatch, markdown){
+						return "\n" + markdown.replace(/^[ ]{0,3}>?[ \t]*$/gm, replacement) + "\n";
+					});
+			}
+		};
+		
+		if(/^(?![ ]{0,3}>)/m.test(chunk.selection)){
+			command.wrap(chunk, wmd.wmd_env.lineLength - 2);
+			chunk.selection = chunk.selection.replace(/^/gm, "> ");
+			replaceBlanksInTags(true);
+			chunk.skipLines();
+		}
+		else{
+			chunk.selection = chunk.selection.replace(/^[ ]{0,3}> ?/gm, "");
+			command.unwrap(chunk);
+			replaceBlanksInTags(false);
+			
+			if(!/^(\n|^)[ ]{0,3}>/.test(chunk.selection) && chunk.startTag){
+				chunk.startTag = chunk.startTag.replace(/\n{0,2}$/, "\n\n");
+			}
+			
+			if(!/(\n|^)[ ]{0,3}>.*$/.test(chunk.selection) && chunk.endTag){
+				chunk.endTag=chunk.endTag.replace(/^\n{0,2}/, "\n\n");
+			}
+		}
+		
+		if(!/\n/.test(chunk.selection)){
+			chunk.selection = chunk.selection.replace(/^(> *)/,
+			function(wholeMatch, blanks){
+				chunk.startTag += blanks;
+				return "";
+			});
+		}
+	};
+
+	command.doCode = function(chunk, postProcessing){
+		
+		var hasTextBefore = /\S[ ]*$/.test(chunk.before);
+		var hasTextAfter = /^[ ]*\S/.test(chunk.after);
+		
+		// Use 'four space' markdown if the selection is on its own
+		// line or is multiline.
+		if((!hasTextAfter && !hasTextBefore) || /\n/.test(chunk.selection)){
+			
+			chunk.before = chunk.before.replace(/[ ]{4}$/,
+				function(totalMatch){
+					chunk.selection = totalMatch + chunk.selection;
+					return "";
+				});
+				
+			var nLinesBack = 1;
+			var nLinesForward = 1;
+			
+			if(/\n(\t|[ ]{4,}).*\n$/.test(chunk.before)){
+				nLinesBack = 0;
+			}
+			if(/^\n(\t|[ ]{4,})/.test(chunk.after)){
+				nLinesForward = 0;
+			}
+			
+			chunk.skipLines(nLinesBack, nLinesForward);
+			
+			if(!chunk.selection){
+				chunk.startTag = "    ";
+				chunk.selection = "enter code here";
+			}
+			else {
+				if(/^[ ]{0,3}\S/m.test(chunk.selection)){
+					chunk.selection = chunk.selection.replace(/^/gm, "    ");
+				}
+				else{
+					chunk.selection = chunk.selection.replace(/^[ ]{4}/gm, "");
+				}
+			}
+		}
+		else{
+			// Use backticks (`) to delimit the code block.
+			
+			chunk.trimWhitespace();
+			chunk.findTags(/`/, /`/);
+			
+			if(!chunk.startTag && !chunk.endTag){
+				chunk.startTag = chunk.endTag="`";
+				if(!chunk.selection){
+					chunk.selection = "enter code here";
+				}
+			}
+			else if(chunk.endTag && !chunk.startTag){
+				chunk.before += chunk.endTag;
+				chunk.endTag = "";
+			}
+			else{
+				chunk.startTag = chunk.endTag="";
+			}
+		}
+	};
+	
+	command.doList = function(chunk, postProcessing, isNumberedList){
+				
+		// These are identical except at the very beginning and end.
+		// Should probably use the regex extension function to make this clearer.
+		var previousItemsRegex = /(\n|^)(([ ]{0,3}([*+-]|\d+[.])[ \t]+.*)(\n.+|\n{2,}([*+-].*|\d+[.])[ \t]+.*|\n{2,}[ \t]+\S.*)*)\n*$/;
+		var nextItemsRegex = /^\n*(([ ]{0,3}([*+-]|\d+[.])[ \t]+.*)(\n.+|\n{2,}([*+-].*|\d+[.])[ \t]+.*|\n{2,}[ \t]+\S.*)*)\n*/;
+		
+		// The default bullet is a dash but others are possible.
+		// This has nothing to do with the particular HTML bullet,
+		// it's just a markdown bullet.
+		var bullet = "-";
+		
+		// The number in a numbered list.
+		var num = 1;
+		
+		// Get the item prefix - e.g. " 1. " for a numbered list, " - " for a bulleted list.
+		var getItemPrefix = function(){
+			var prefix;
+			if(isNumberedList){
+				prefix = " " + num + ". ";
+				num++;
+			}
+			else{
+				prefix = " " + bullet + " ";
+			}
+			return prefix;
+		};
+		
+		// Fixes the prefixes of the other list items.
+		var getPrefixedItem = function(itemText){
+		
+			// The numbering flag is unset when called by autoindent.
+			if(isNumberedList === undefined){
+				isNumberedList = /^\s*\d/.test(itemText);
+			}
+			
+			// Renumber/bullet the list element.
+			itemText = itemText.replace(/^[ ]{0,3}([*+-]|\d+[.])\s/gm,
+				function( _ ){
+					return getItemPrefix();
+				});
+				
+			return itemText;
+		};
+		
+		chunk.findTags(/(\n|^)*[ ]{0,3}([*+-]|\d+[.])\s+/, null);
+		
+		if(chunk.before && !/\n$/.test(chunk.before) && !/^\n/.test(chunk.startTag)){
+			chunk.before += chunk.startTag;
+			chunk.startTag = "";
+		}
+		
+		if(chunk.startTag){
+			
+			var hasDigits = /\d+[.]/.test(chunk.startTag);
+			chunk.startTag = "";
+			chunk.selection = chunk.selection.replace(/\n[ ]{4}/g, "\n");
+			command.unwrap(chunk);
+			chunk.skipLines();
+			
+			if(hasDigits){
+				// Have to renumber the bullet points if this is a numbered list.
+				chunk.after = chunk.after.replace(nextItemsRegex, getPrefixedItem);
+			}
+			if(isNumberedList == hasDigits){
+				return;
+			}
+		}
+		
+		var nLinesUp = 1;
+		
+		chunk.before = chunk.before.replace(previousItemsRegex,
+			function(itemText){
+				if(/^\s*([*+-])/.test(itemText)){
+					bullet = re.$1;
+				}
+				nLinesUp = /[^\n]\n\n[^\n]/.test(itemText) ? 1 : 0;
+				return getPrefixedItem(itemText);
+			});
+			
+		if(!chunk.selection){
+			chunk.selection = "List item";
+		}
+		
+		var prefix = getItemPrefix();
+		
+		var nLinesDown = 1;
+		
+		chunk.after = chunk.after.replace(nextItemsRegex,
+			function(itemText){
+				nLinesDown = /[^\n]\n\n[^\n]/.test(itemText) ? 1 : 0;
+				return getPrefixedItem(itemText);
+			});
+			
+		chunk.trimWhitespace(true);
+		chunk.skipLines(nLinesUp, nLinesDown, true);
+		chunk.startTag = prefix;
+		var spaces = prefix.replace(/./g, " ");
+		command.wrap(chunk, wmd.wmd_env.lineLength - spaces.length);
+		chunk.selection = chunk.selection.replace(/\n/g, "\n" + spaces);
+		
+	};
+	
+	command.doHeading = function(chunk, postProcessing){
+		
+		// Remove leading/trailing whitespace and reduce internal spaces to single spaces.
+		chunk.selection = chunk.selection.replace(/\s+/g, " ");
+		chunk.selection = chunk.selection.replace(/(^\s+|\s+$)/g, "");
+		
+		// If we clicked the button with no selected text, we just
+		// make a level 2 hash header around some default text.
+		if(!chunk.selection){
+			chunk.startTag = "## ";
+			chunk.selection = "Heading";
+			chunk.endTag = " ##";
+			return;
+		}
+		
+		var headerLevel = 0;		// The existing header level of the selected text.
+		
+		// Remove any existing hash heading markdown and save the header level.
+		chunk.findTags(/#+[ ]*/, /[ ]*#+/);
+		if(/#+/.test(chunk.startTag)){
+			headerLevel = re.lastMatch.length;
+		}
+		chunk.startTag = chunk.endTag = "";
+		
+		// Try to get the current header level by looking for - and = in the line
+		// below the selection.
+		chunk.findTags(null, /\s?(-+|=+)/);
+		if(/=+/.test(chunk.endTag)){
+			headerLevel = 1;
+		}
+		if(/-+/.test(chunk.endTag)){
+			headerLevel = 2;
+		}
+		
+		// Skip to the next line so we can create the header markdown.
+		chunk.startTag = chunk.endTag = "";
+		chunk.skipLines(1, 1);
+
+		// We make a level 2 header if there is no current header.
+		// If there is a header level, we substract one from the header level.
+		// If it's already a level 1 header, it's removed.
+		var headerLevelToCreate = headerLevel == 0 ? 2 : headerLevel - 1;
+		
+		if(headerLevelToCreate > 0){
+			
+			// The button only creates level 1 and 2 underline headers.
+			// Why not have it iterate over hash header levels?  Wouldn't that be easier and cleaner?
+			var headerChar = headerLevelToCreate >= 2 ? "-" : "=";
+			var len = chunk.selection.length;
+			if(len > wmd.wmd_env.lineLength){
+				len = wmd.wmd_env.lineLength;
+			}
+			chunk.endTag = "\n";
+			while(len--){
+				chunk.endTag += headerChar;
+			}
+		}
+	};	
+	
+	command.doHorizontalRule = function(chunk, postProcessing){
+		chunk.startTag = "----------\n";
+		chunk.selection = "";
+		chunk.skipLines(2, 1, true);
+	}
+};
+
+
+Attacklab.wmd_env = {};
+Attacklab.account_options = {};
+Attacklab.wmd_defaults = {version:1, output:"Markdown", lineLength:40, delayLoad:false};
+
+if(!Attacklab.wmd)
+{
+	Attacklab.wmd = function()
+	{
+		Attacklab.loadEnv = function()
+		{
+			var mergeEnv = function(env)
+			{
+				if(!env)
+				{
+					return;
+				}
+			
+				for(var key in env)
+				{
+					Attacklab.wmd_env[key] = env[key];
+				}
+			};
+			
+			mergeEnv(Attacklab.wmd_defaults);
+			mergeEnv(Attacklab.account_options);
+			mergeEnv(top["wmd_options"]);
+			Attacklab.full = true;
+			
+			var defaultButtons = "bold italic link blockquote code image ol ul heading hr";
+			Attacklab.wmd_env.buttons = Attacklab.wmd_env.buttons || defaultButtons;
+		};
+		Attacklab.loadEnv();
+
+	};
+	
+	Attacklab.wmd();
+	Attacklab.wmdBase();
+	Attacklab.Util.startEditor();
+};
+
-- 
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