function message(inParent, inID, inAccountID, inUsername, inTimeAgo, inMessage, inReplies) {

	this.idString = function() {
	
		// Generate id string for divs associated with this object
		if (this.isRoot())
			return "root";
		else
			return this.id;
			
	} // function idString
	
	
	this.isRoot = function() {
	
		return (typeof(this.parent) === "undefined")
		
	} // function isRoot
			
	
	this.increaseReplies = function() {
		
		// The number of replies isn't reported for the root
		if (this.isRoot())
			return true;
			
		// Increase replies
		this.replies++;
		document.getElementById('discussion_msg' + this.idString() + '_numreplies').innerHTML = this.replies + ' replies';
		
	} // function increaseReplies
	
	
	this.updateRepliesLeft = function(inRepliesLeft) {
	
		// Update replies
		this.repliesLeft = inRepliesLeft;
	
		// If there are no replies left hide the button
		if (inRepliesLeft <= 0) {
			document.getElementById('discussion_msg' + this.idString() + '_repliesleft').style.display = 'none';
		}
		// Otherwise display the button
		else {
			if (this.isRoot())
				document.getElementById('discussion_msg' + this.idString() + '_repliesleft').innerHTML = 'load more messages (' + inRepliesLeft + ')';
			else
				document.getElementById('discussion_msg' + this.idString() + '_repliesleft').innerHTML = 'load more replies (' + inRepliesLeft + ')';
		}
	
	} // function updateRepliesLeft

	
	this.hidePostingReply = function() {
		document.getElementById('discussion_msg' + this.idString() + '_postingreply').style.display = 'none';
	}
	
	
	this.showPostingReply = function() {
		document.getElementById('discussion_msg' + this.idString() + '_postingreply').style.display = 'block';
	}
	
	
	this.hideLoadingReplies = function() {
		document.getElementById('discussion_msg' + this.idString() + '_loadingreplies').style.display = 'none';
	}
	
	
	this.showLoadingReplies = function() {
		document.getElementById('discussion_msg' + this.idString() + '_loadingreplies').style.display = 'block';
	}
	
	
	this.loadChildren = function(inStartAfterMessageID, inEndOnMessageID) {
	
		// Say loading
		this.showLoadingReplies();
	
		// Set up http request object
		var http;
		if (XMLHttpRequest)
			http = new XMLHttpRequest();
		else if (ActiveXObject)
			http = new ActiveXObject("Microsoft.XMLHTTP");
			
		// Pass the message ID if this isn't the root
		var paramMessageID = '';
		if (!this.isRoot())
			paramMessageID = '&mid=' + this.id;

		// Are we starting after a message id?
		var paramStartAfter = '';
		if (typeof(inStartAfterMessageID) !== 'undefined')
			paramStartAfter = '&startafter=' + inStartAfterMessageID;
			
		// Are we ending on a message id?
		var paramEndOn = '';
		if (typeof(inStartAfterMessageID) !== 'undefined')
			paramEndOn = '&endon=' + inEndOnMessageID;

		// Request data
		http.open('GET', 'http://' + domain() + '/ajax/discussion_getreplies.php?did=' + globalDiscussionID + paramMessageID + paramStartAfter + paramEndOn);	
	

		http.onreadystatechange = function (inParentID) { return function() {
		
			// When ready with data
			if (http.readyState == 4) {

				// Get the parent message object (needed even if error to hide loading text)
				parentMessage = globalRootMessage;
				if (inParentID != null)
					parentMessage = globalRootMessage.getMessageByID(inParentID);
			
				// Success
				if (http.status == 200) {
				
					// Check for an error
					var error = http.responseXML.getElementsByTagName("error");
					if (error.item(0) != null) {
						alert('Error: ' + error.item(0).childNodes[0].nodeValue);
					}
					else {
					
						// Load XML and determine which message the replies are for
						var root = http.responseXML.getElementsByTagName("replies").item(0);
						var parentMessage;
						

					
						// Add each message
						for (var i = 0; i < root.getElementsByTagName("reply").length; i++) {

							// Create the div for this message
							document.getElementById('discussion_msg' + parentMessage.idString() + '_replies').innerHTML +=
								'<div id="discussion_msg' + root.getElementsByTagName("reply").item(i).getAttribute('id') + '" class="discussion_msg"></div>';

							// Create the message object, which sets up the html
							parentMessage.children.push( new message( parentMessage,
								root.getElementsByTagName("reply").item(i).getAttribute('id'),
								root.getElementsByTagName("reply").item(i).getAttribute('accountid'),
								root.getElementsByTagName("reply").item(i).getAttribute('username'),
								root.getElementsByTagName("reply").item(i).getAttribute('timeago'),
								root.getElementsByTagName("reply").item(i).childNodes[0].nodeValue,
								root.getElementsByTagName("reply").item(i).getAttribute('replies')
								));
								
							// Pulse the child
							parentMessage.children[parentMessage.children.length - 1].pulseTitle();
								
						}
						
						// Mark some messages as loaded
						parentMessage.loadedSomeReplies = true;
						
						// Set the number of messages remaining to load
						parentMessage.updateRepliesLeft(root.getAttribute('repliesleft'));
						

						
						// If this is part of an initial load sequence then keep going or display the messages
						if (typeof(window.globalMessageLoadSequence) !== 'undefined' && window.globalMessageLoadSequence.length > 0) {
				
							// Check that the message was loaded properly
							var curMID = window.globalMessageLoadSequence.shift();
							if (!globalRootMessage.getMessageByID(curMID)) {
								alert('Error loading message.');
								return false;
							}
							
							// Show the replies
							globalRootMessage.getMessageByID(curMID).parent.showReplies();

							// No problem -- show the messages or load the next message
							if (window.globalMessageLoadSequence.length > 0) {
								globalRootMessage.getMessageByID(curMID).loadChildren(null, window.globalMessageLoadSequence[0]);					
							}
							else {
								document.getElementById('discussion_loading').style.display = 'none';
								document.getElementById('discussion_msgroot').style.display = 'block';
								globalRootMessage.getMessageByID(curMID).highlight();
								globalRootMessage.getMessageByID(curMID).scrollTo();
								globalPulsingEnabled = true;
							}
							
						}
						else {
							
							// Initial load over -- allow pulsing
							globalPulsingEnabled = true;
							
						}
						

						
					}
						
				}

				// Failure
				else {
					alert('Error retrieving messages.');
				}
				
				// Hide loading icon
				parentMessage.hideLoadingReplies();
				
				// Check if there are any messages and if not show "no messages"
				globalRootMessage.updateNoMessagesText();
				
			}
		
		}}(this.id); // Pass parameters to return function
		http.send(null);
	
	} // function loadChildren

	
	
	this.updateNoMessagesText = function() {
	
		// Check if there are any messages and if not show "no messages"
		if (globalRootMessage.children.length == 0)
			document.getElementById('discussion_empty').style.display = 'block';
		else
			document.getElementById('discussion_empty').style.display = 'none';
	
	} // function updateNoMessagesText
	
	
		
	this.setHTML = function() {
	
		// If this is the root then over-ride the margin-left style
		var marginText = '';
		if (this.isRoot()) 
			marginText = ' style="margin-left: 0;"';
			
		// Set HMTL: anchor name
		buildHTML = '';
		buildHTML += '<a name="msg_' + this.idString() + '"></a>';
			
		// Set HTML: title
		if (!this.isRoot()) {
			buildHTML += '<div id="discussion_msg' + this.idString() + '_title" class="discussion_title">';
			buildHTML +=	'<a href="/member/' + string2DashedFolder(this.username) + '">' + this.username + '</a> ';
			buildHTML +=	'<span style="color: #666;">' + this.timeAgo + '</span> ';
			buildHTML += '</div>';
		}
		
		// Set HTML: message
		if (!this.isRoot()) {
			buildHTML += '<div id="discussion_msg' + this.idString() + '_message" class="discussion_message">' + this.message + '</div>';
		}
		
		// Set HTML: actions
		buildHTML += '<div id="discussion_msg' + this.idString() + '_actions" class="discussion_actions">';
		if (!this.isRoot()) {
			
			// Highlight the number of replies if there are some
			var numRepliesStyle = '';
			if (this.replies > 0)
				numRepliesStyle = 'border-bottom: 1px solid #900;';
			
			// Add to HTML
			buildHTML += '<a href="#" class="darklink" id="discussion_msg' + this.idString() + '_numreplies" style="margin-right: 10px;' + numRepliesStyle + '" onclick="globalRootMessage.getMessageByID(\'' + this.id + '\').toggleReplies(); return false;">' + this.replies + ' replies</a>';
			if (globalLoggedIn) {
				buildHTML += '<a href="#" class="darklink" onclick="globalRootMessage.getMessageByID(\'' + this.id + '\').toggleReplyForm(true); return false;">reply</a>';	
			}
		}
		else {
			if (globalLoggedIn) {
				buildHTML += '<a href="#" class="darklink" onclick="globalRootMessage.toggleReplyForm(true); return false;">post message</a>';	
			}
			else {
				buildHTML += 'You must be logged in to post a message.';	
			}
		}
		buildHTML += '</div>';
		
		// Set HTML: replyform
		if (globalLoggedIn) {
			buildHTML += '<div' + marginText + ' id="discussion_msg' + this.idString() + '_replyform" class="discussion_replyform">';
			buildHTML +=	'<div id="discussion_msg' + this.idString() + '_replyformtitle"><a href="/member/' + string2DashedFolder(globalUsername) + '">' + globalUsername + '</a> <span style="color: #666;">0 minutes ago</span></div>';
			buildHTML +=	'<div><textarea id="discussion_msg' + this.idString() + '_replytext" class="discussion_replytext"></textarea></div>';
			buildHTML +=	'<div>';
			buildHTML +=		'<a href="#" class="button" style="margin-right: 10px;" onclick="globalRootMessage.getMessageByID(\'' + this.idString() + '\').postReply(); return false;">Post</a>';
			buildHTML +=		'<a href="#" class="button" onclick="globalRootMessage.getMessageByID(\'' + this.idString() + '\').hideReplyForm(true); return false;">Cancel</a>';
			buildHTML +=	'</div>';
			buildHTML += '</div>';
		}
		
		// Set HTML: postingreply
		buildHTML += '<div' + marginText + ' id="discussion_msg' + this.idString() + '_postingreply" class="discussion_postingreply">';
		buildHTML +=	'<div>Posting reply...</div>';
		buildHTML += 	'<div><img src="/images/inprogress.gif" style="height: 10px; width: 30px;" /></div>';
		buildHTML += '</div>';
		
		// Set HTML: replies
		buildHTML += '<div' + marginText + ' id="discussion_msg' + this.idString() + '_replies" class="discussion_replies"></div>';
		
		// Set HTML: loadingreplies
		buildHTML += '<div' + marginText + ' id="discussion_msg' + this.idString() + '_loadingreplies" class="discussion_loadingreplies">';
		buildHTML +=	'<div>Loading messages...</div>';
		buildHTML += 	'<div><img src="/images/inprogress.gif" style="height: 10px; width: 30px;" /></div>';
		buildHTML += '</div>';
		
		// Set HTML: morereplies
		buildHTML += '<div' + marginText + ' id="discussion_msg' + this.idString() + '_morereplies" class="discussion_morereplies">';
		if (this.isRoot()) {
			buildHTML += '<a href="#" class="darklink" onclick="globalRootMessage.getMessageByID(\'' + this.idString() + '\').loadMoreReplies(); return false;" id="discussion_msg' + this.idString() + '_repliesleft"></a>';
		}
		else {
			buildHTML += '<a href="#" class="darklink" onclick="globalRootMessage.getMessageByID(\'' + this.idString() + '\').loadMoreReplies(); return false;" style="margin-right: 10px;" id="discussion_msg' + this.idString() + '_repliesleft"></a>';
		}
		buildHTML += '</div>';
		
		
		// Set HTML
		document.getElementById('discussion_msg' + this.idString()).innerHTML = buildHTML;
	
	
	}
	
	
	this.postReply = function() {
	
		// Check if a reply was entered
		if (document.getElementById("discussion_msg" + this.idString() + "_replytext").value == '') {
			alert('Please enter a message.');
			document.getElementById("discussion_msg" + this.idString() + "_replytext").focus();
			return false;
		}
	
		// Say posting reply
		this.showPostingReply();
	
		// Set up http request object
		var http;
		if (XMLHttpRequest)
			http = new XMLHttpRequest();
		else if (ActiveXObject)
			http = new ActiveXObject("Microsoft.XMLHTTP");

		// Set up parameters
		var params = 'did=' + globalDiscussionID;
		if (!this.isRoot())
			params += '&pid=' + this.id;
		params += '&message=' + encodeURIComponent(document.getElementById("discussion_msg" + this.idString() + "_replytext").value);

		// Request
		http.open("POST", 'http://' + domain() + '/ajax/discussion_post.php', true);
		http.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		http.setRequestHeader("Content-length", params.length);
		http.setRequestHeader("Connection", "close");
		http.onreadystatechange = function (inParentID, inReplyText) { return function() {

			// When ready with data
			if (http.readyState == 4) {

				// Get the parent message object (needed even if error to hide loading text)
				var parentMessage = globalRootMessage;
				if (inParentID != null)
					parentMessage = globalRootMessage.getMessageByID(inParentID);
			
				// Success
				if (http.status == 200) {
								
					// Check for an error
					var error = http.responseXML.getElementsByTagName("error");
					if (error.item(0) != null) {
						alert('Error: ' + error.item(0).childNodes[0].nodeValue);
					}
					else {
						
						// Load XML and determine which message the reply is for
						var root = http.responseXML.getElementsByTagName("success").item(0);
						var newMessageID = root.getAttribute("id");
												
						// Create the div for this message at the beginning of the container
						document.getElementById('discussion_msg' + parentMessage.idString() + '_replies').innerHTML =
							'<div id="discussion_msg' + newMessageID + '" class="discussion_msg"></div>'
							+ document.getElementById('discussion_msg' + parentMessage.idString() + '_replies').innerHTML;

						// Add the object to the beginning of children array (creates its own html)
						for (var i = parentMessage.children.length; i > 0; i--)
							parentMessage.children[i] = parentMessage.children[i-1]
						parentMessage.children[0] = new message( parentMessage,
							newMessageID,
							globalAccountID,
							globalUsername,
							'0 minutes ago',
							htmlspecialchars(inReplyText),
							0
							);
							
						// Increase the number of replies
						parentMessage.increaseReplies();
						
						// Pulse reply title or parent num replies depending on whether replies are visible
						if (document.getElementById('discussion_msg' + parentMessage.idString() + '_replies').style.display != 'block')
							parentMessage.pulseNumReplies();
						else
							parentMessage.children[0].pulseTitle();
							
					}
					
				}

				// Failure
				else {
					alert('Error posting message.');
				}

				// Check if there are any messages and if not show "no messages"
				globalRootMessage.updateNoMessagesText();
				
				// Hide 'posting reply' message
				parentMessage.hidePostingReply();
				
			}
			
		} }(this.id, document.getElementById("discussion_msg" + this.idString() + "_replytext").value); // Pass parameters to onreadystatechange
		http.send(params);
		
		// Reset and hide the reply form
		document.getElementById("discussion_msg" + this.idString() + "_replytext").value = '';
		this.hideReplyForm(false);
	

	} // function postReply
	
	
	this.loadMoreReplies = function() {
	
		this.loadChildren(this.children[this.children.length-1].id);
	
	} // function loadMoreReplies
	
	
	this.toggleReplyForm = function(inPulse) {
		
		// Switch visibility
		if (document.getElementById('discussion_msg' + this.idString() + '_replyform').style.display != 'block') 
			this.showReplyForm(inPulse);
		else
			this.hideReplyForm(inPulse);
	
	} // function toggleReplyForm
	
	
	this.showReplyForm = function(inPulse) {
		
		// Switch visibility
		document.getElementById('discussion_msg' + this.idString() + '_replyform').style.display = 'block';
		
		// Set focus
		document.getElementById('discussion_msg' + this.idString() + '_replytext').focus();
		
		// Pulse the reply form title
		if (typeof(inPulse) !== 'undefined' && inPulse == true)
			this.pulseReplyFormTitle();
	
	} // function showReplyForm
	
	
	this.hideReplyForm = function(inPulse) {
		
		// Switch visibility
		document.getElementById('discussion_msg' + this.idString() + '_replyform').style.display = 'none';

		// Pulse title
		if (typeof(inPulse) !== 'undefined' && inPulse == true)
			this.pulseTitle();
	
	} // function hideReplyForm
	
	
	this.showReplies = function() {
	
		// If there are no replies then abort
		// Except root, since we don't know how many replies there are
		if (this.replies <= 0 && !this.isRoot())
			return true;

		// Load children if necessary
		if (!this.loadedSomeReplies)
			this.loadChildren();
	
		// Show replies and "more replies" button
		var replies = document.getElementById('discussion_msg' + this.idString() + '_replies');
		var moreReplies = document.getElementById('discussion_msg' + this.idString() + '_morereplies');
		replies.style.display = 'block';
		moreReplies.style.display = 'block';
		
		// Pulse all the replies
		for (i = 0; i < this.children.length; i++)
			this.children[i].pulseTitle();
		
			
	} // function showReplies
	
	
	this.hideReplies = function() {
	
		var replies = document.getElementById('discussion_msg' + this.idString() + '_replies');
		var moreReplies = document.getElementById('discussion_msg' + this.idString() + '_morereplies');
		replies.style.display = 'none';
		moreReplies.style.display = 'none';
		
		this.pulseTitle();
		
	} // function hideReplies
	
	
	this.toggleReplies = function() {

		if (document.getElementById('discussion_msg' + this.idString() + '_replies').style.display != 'block') {
			this.showReplies();
		}
		else {
			this.hideReplies();
		}
	
	} // function toggleReplies
		
	
	this.getMessageByID = function(inMessageID) {
		
		// If this is the message return self, otherwise recurse on children
		if (inMessageID == this.id || (inMessageID == 'root' && this.isRoot())) {
			return this;
		}
		else {
			for (key in this.children) {
				var res = this.children[key].getMessageByID(inMessageID);
				if (res)
					return res;
			}
		}
		return false;
	
	} // function getMessageByID
	
	
	this.loadDescendentByID = function(inID) {
	
		// Hide the discussion and show the loading notice
		document.getElementById('discussion_loading').style.display = 'block';
		document.getElementById('discussion_msgroot').style.display = 'none';
		
		
		// Set up http request object to get ancestor IDs
		var http;
		if (XMLHttpRequest)
			http = new XMLHttpRequest();
		else if (ActiveXObject)
			http = new ActiveXObject("Microsoft.XMLHTTP");

		
		// Request data
		http.open('GET', 'http://' + domain() + '/ajax/discussion_getancestorids.php?mid=' + inID);	
		http.onreadystatechange = function () {

			// When ready with data
			if (http.readyState == 4) {

				// Success
				if (http.status == 200) {
				
					// Load XML and cycle through ancestor ids
					var root = http.responseXML.getElementsByTagName("ids").item(0);

					// Add each ancestor id
					window.globalMessageLoadSequence = [];
					for (var i = 0; i < root.getElementsByTagName("id").length; i++)
						window.globalMessageLoadSequence.push(root.getElementsByTagName("id").item(i).childNodes[0].nodeValue);
					window.globalMessageLoadSequence.push(inID);
					
					// Start loading the first message
					globalRootMessage.loadChildren(null, window.globalMessageLoadSequence[0]);					
						
				}

				// Failure
				else {
					
					// Alert error
					alert('Error displaying message.');
					
					// Hide loading display
					globalRootMessage.updateNoMessagesText();
					document.getElementById('discussion_loading').style.display = 'none';
					document.getElementById('discussion_msgroot').style.display = 'block';
					
				}

			}
		}
		http.send(null);
		
		
	} // function loadDescendentByID
	
	
	this.scrollTo = function() {
	
		// curLocation = window.location.href;
		// window.location = curLocation.substring(0, curLocation.indexOf('#') - 1) + '#msg_' + this.idString();
	
		window.location.href = '#msg_' + this.idString();
	
	} // function scrollTo
	
	
	this.highlight = function() {
	
		document.getElementById('discussion_msg' + this.idString() + '_title').style.backgroundColor = '#161616';
	
	} // function highlight
	
	
	this.pulseTitle = function() {
	
		// No pulsing the root
		if (!this.isRoot() && globalPulsingEnabled == true)
			pulse('discussion_msg' + this.idString() + '_title');
	
	} // function pulseTitle
	

	this.pulseReplyFormTitle = function() {
		
		if (globalPulsingEnabled == true)
			pulse('discussion_msg' + this.idString() + '_replyformtitle');
	
	} // function pulseReplyFormTitle
	
	
	this.pulseNumReplies = function() {
	
		if (globalPulsingEnabled == true)
			pulse('discussion_msg' + this.idString() + '_numreplies');
	
	} // function pulseNumReplies
	
	
	
	// Constructor
	this.children = [];
	this.loadedSomeReplies = false;

	// These variables are null for the root message object
	if (typeof(inParent) !== "undefined") {
		this.parent = inParent;
		this.id = inID;
		this.accountID = inAccountID;
		this.username = inUsername;
		this.timeAgo = inTimeAgo;
		this.message = inMessage; // This will contain markdown HTML and no user HTML -- do not escape
		this.replies = inReplies;
	}
	
	// Set up the HTML
	this.setHTML();
		


}





function pulse(inDivID) {

	pulseIteration(inDivID, 1);

} // function pulse


function pulseIteration(inDivID, inIterationNumber) {

	// Set max iterations
	var maxIterations = 35;
		
	// Set the new color
	var rgb = Math.round(35 * (1 - inIterationNumber / maxIterations) + 3);
	var bgColor = 'rgb(' + rgb + ', ' + rgb + ', ' + rgb + ')';
	document.getElementById(inDivID).style.backgroundColor = bgColor;
	
	// Continue iterating if necessary or reset background color
	if (inIterationNumber < maxIterations)
		setTimeout('pulseIteration("' + inDivID + '", ' + (inIterationNumber + 1) + ');', 50);
	else
		document.getElementById(inDivID).style.backgroundColor = '';

} // function pulseIteration