var queue = new Array();
var http = null;

function createRequestObject(){
	var request_o;
	var browser = navigator.appName;
	if (browser == "Microsoft Internet Explorer") {
		request_o = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		request_o = new XMLHttpRequest();
	}
	return request_o;
}

function queueJump() {
	queue.shift();
	http = null;
	setTimeout("dequeueRequests();",100);
}

function abortAJAX() {
	if (http && queue.length) {
		var qitem = queue[0];
		var qaction = qitem[0];
		if (qaction == "getSnapshot") {
			http.abort();
			queue.shift();
			http = null;
			dequeueRequests();
		}
	}
}

function enqueueRequest(t,u,r) {
	var qlen = queue.length;
	var qout = "";
	queue[qlen] = new Array(t,u,r);
	for (var i=0; i < queue.length; i++) {
		qout += queue[i] + "\n";
	}
	if (!http) {
		dequeueRequests();
	}
}

function dequeueRequests() {
	if (queue.length) {
		if (!http) {
			var qitem = queue[0];
			var qaction = qitem[0];
			var qurl = qitem[1];
			var qreq = qitem[2];
			http = createRequestObject();
			http.open('post',qurl+"?action="+qaction+"&"+qreq);
			http.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
			switch (qaction) {
				case "sendMessage":
					http.onreadystatechange = outputSuccess;
					break;
				case "getinboxPage":
					http.onreadystatechange = outputInboxMsgs;
					break;
				case "getsentPage":
					http.onreadystatechange = outputSentMsgs;
					break;
				case "getactivePage":
					http.onreadystatechange = outputActiveItems;
					break;
				case "getinactivePage":
					http.onreadystatechange = outputInactiveItems;
					break;
				case "getItemPage":
					http.onreadystatechange = outputItems;
					break;
				case "testUserName":
					http.onreadystatechange = outputUnameTest;
					break;
				case "testEmail":
					http.onreadystatechange = outputEmailTest;
					break;
				case "updateUserDetails":
					http.onreadystatechange = outputUpdateDet;
					break;
				case "getPreview":
					http.onreadystatechange = outputPreviewData;
					break;
				case "getSnapshot":
					http.onreadystatechange = outputSnapShot;
					break;
				case "grabImg":
					http.onreadystatechange = outputImgLoc;
					break;
				case "removeImage":
					http.onreadystatechange = processRemImage;
					break;
				case "getBookData":
					http.onreadystatechange = outputProcessISBNData;
					break;
				case "getDVDInfo":
					http.onreadystatechange = outputProcessDVDData;
					break;
				case "getGameInfo":
					http.onreadystatechange = outputProcessGameData;
					break;
				case "testPublish":
					http.onreadystatechange = outputTestPublish;
					break;
				case "publishItem":
					http.onreadystatechange = outputPublished;
					break;
				case "getNewMonth":
					http.onreadystatechange = showNewCal;
					break;
				case "saveEdit":
					http.onreadystatechange = outputSaved;
					break;
				case "getNewItemImage":
					http.onreadystatechange = swapFSImage;
					break;
				case "saveDraft":
					http.onreadystatechange = outputSaveDraft;
					break;
				case "reportItem":
					http.onreadystatechange = reportSuccess;
					break;
				case "forwardItem":
					http.onreadystatechange = fwdSuccess;
					break;
				case "sendItemMessage":
					http.onreadystatechange = outputMessageSuccess;
					break;
				case "sendContactUs":
					http.onreadystatechange = showContactResult;
					break;
				case "sendFeedback":
					http.onreadystatechange = showFeedbackResult;
					break;
				case "showSchools":
					http.onreadystatechange = showSchoolsOutput;
					break;
				case "changeSchools":
					http.onreadystatechange = finishChangeSchool;
					break;
				case "countDockStuff":
					http.onreadystatechange = recalcPagingOutput;
					break;
				default:
					http.onreadystatechange = doNothing;
					break;
			}
			http.send(qreq);
		} else {
			setTimeout("dequeueRequests()", 100);
		}
	}
}


/*
	Tooltip AJAX
*/

/* Simple AJAX Code-Kit (SACK) */
/* ©2005 Gregory Wild-Smith */
/* www.twilightuniverse.com */
/* Software licenced under a modified X11 licence, see documentation or authors website for more details */

function sack(file){
	this.AjaxFailedAlert = "Your browser does not support the enhanced functionality of this website, and therefore you will have an experience that differs from the intended one.\n";
	this.requestFile = file;
	this.method = "POST";
	this.URLString = "";
	this.encodeURIString = true;
	this.execute = false;

	this.onLoading = function() { };
	this.onLoaded = function() { };
	this.onInteractive = function() { };
	this.onCompletion = function() { };

	this.createAJAX = function() {
		try {
			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (err) {
				this.xmlhttp = null;
			}
		}
		if(!this.xmlhttp && typeof XMLHttpRequest != "undefined")
			this.xmlhttp = new XMLHttpRequest();
		if (!this.xmlhttp){
			this.failed = true; 
		}
	};
	
	this.setVar = function(name, value){
		if (this.URLString.length < 3){
			this.URLString = name + "=" + value;
		} else {
			this.URLString += "&" + name + "=" + value;
		}
	}
	
	this.encVar = function(name, value){
		var varString = encodeURIComponent(name) + "=" + encodeURIComponent(value);
	return varString;
	}
	
	this.encodeURLString = function(string){
		varArray = string.split('&');
		for (i = 0; i < varArray.length; i++){
			urlVars = varArray[i].split('=');
			if (urlVars[0].indexOf('amp;') != -1){
				urlVars[0] = urlVars[0].substring(4);
			}
			varArray[i] = this.encVar(urlVars[0],urlVars[1]);
		}
	return varArray.join('&');
	}
	
	this.runResponse = function(){
		eval(this.response);
	}
	
	this.runAJAX = function(urlstring){
		this.responseStatus = new Array(2);
		if(this.failed && this.AjaxFailedAlert){ 
			alert(this.AjaxFailedAlert); 
		} else {
			if (urlstring){ 
				if (this.URLString.length){
					this.URLString = this.URLString + "&" + urlstring; 
				} else {
					this.URLString = urlstring; 
				}
			}
			if (this.encodeURIString){
				var timeval = new Date().getTime(); 
				this.URLString = this.encodeURLString(this.URLString);
				this.setVar("rndval", timeval);
			}
			if (this.element) { this.elementObj = document.getElementById(this.element); }
			if (this.xmlhttp) {
				var self = this;
				if (this.method == "GET") {
					var totalurlstring = this.requestFile + "?" + this.URLString;
					this.xmlhttp.open(this.method, totalurlstring, true);
				} else {
					this.xmlhttp.open(this.method, this.requestFile, true);
				}
				if (this.method == "POST"){
  					try {
						this.xmlhttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded')  
					} catch (e) {}
				}

				this.xmlhttp.send(this.URLString);
				this.xmlhttp.onreadystatechange = function() {
					switch (self.xmlhttp.readyState){
						case 1:
							self.onLoading();
						break;
						case 2:
							self.onLoaded();
						break;
						case 3:
							self.onInteractive();
						break;
						case 4:
							self.response = self.xmlhttp.responseText;
							self.responseXML = self.xmlhttp.responseXML;
							self.responseStatus[0] = self.xmlhttp.status;
							self.responseStatus[1] = self.xmlhttp.statusText;
							self.onCompletion();
							if(self.execute){ self.runResponse(); }
							if (self.elementObj) {
								var elemNodeName = self.elementObj.nodeName;
								elemNodeName.toLowerCase();
								if (elemNodeName == "input" || elemNodeName == "select" || elemNodeName == "option" || elemNodeName == "textarea"){
									self.elementObj.value = self.response;
								} else {
									self.elementObj.innerHTML = self.response;
								}
							}
							self.URLString = "";
						break;
					}
				};
			}
		}
	};
this.createAJAX();
}

var enableCache = true;
var jsCache = new Array();

var dynamicContent_ajaxObjects = new Array();
function ajax_showContent(divId,ajaxIndex,url)
{
	document.getElementById(divId).innerHTML = dynamicContent_ajaxObjects[ajaxIndex].response;
	if(enableCache){
		jsCache[url] = 	dynamicContent_ajaxObjects[ajaxIndex].response;
	}
	dynamicContent_ajaxObjects[ajaxIndex] = false;
}

function ajax_loadContent(divId,url)
{
	if(enableCache && jsCache[url]){
		document.getElementById(divId).innerHTML = jsCache[url];
		return;
	}
	
	var ajaxIndex = dynamicContent_ajaxObjects.length;
	document.getElementById(divId).innerHTML = '<img src="./images/indicator.gif">';
	dynamicContent_ajaxObjects[ajaxIndex] = new sack();
	dynamicContent_ajaxObjects[ajaxIndex].requestFile = url;	// Specifying which file to get
	dynamicContent_ajaxObjects[ajaxIndex].onCompletion = function(){ ajax_showContent(divId,ajaxIndex,url); };	// Specify function that will be executed after file has been found
	dynamicContent_ajaxObjects[ajaxIndex].runAJAX();		// Execute AJAX function	
}

/* Custom variables */

/* Offset position of tooltip */
var x_offset_tooltip = 5;
var y_offset_tooltip = 0;

/* Don't change anything below here */

var ajax_tooltipObj = false;
var ajax_tooltipObj_iframe = false;

var ajax_tooltip_MSIE = false;
if(navigator.userAgent.indexOf('MSIE')>=0)ajax_tooltip_MSIE=true;


function ajax_showTooltip(externalFile,inputObj)
{
	if(!ajax_tooltipObj)	/* Tooltip div not created yet ? */
	{
		ajax_tooltipObj = document.createElement('DIV');
		ajax_tooltipObj.style.position = 'absolute';
		ajax_tooltipObj.id = 'ajax_tooltipObj';		
		document.body.appendChild(ajax_tooltipObj);

		
		var leftDiv = document.createElement('DIV');	/* Create arrow div */
		leftDiv.className='ajax_tooltip_arrow';
		leftDiv.id = 'ajax_tooltip_arrow';
		ajax_tooltipObj.appendChild(leftDiv);
		
		var contentDiv = document.createElement('DIV'); /* Create tooltip content div */
		contentDiv.className = 'ajax_tooltip_content';
		ajax_tooltipObj.appendChild(contentDiv);
		contentDiv.id = 'ajax_tooltip_content';
		
		if(ajax_tooltip_MSIE){	/* Create iframe object for MSIE in order to make the tooltip cover select boxes */
			ajax_tooltipObj_iframe = document.createElement('<IFRAME frameborder="0">');
			ajax_tooltipObj_iframe.style.position = 'absolute';
			ajax_tooltipObj_iframe.border='0';
			ajax_tooltipObj_iframe.frameborder=0;
			ajax_tooltipObj_iframe.style.backgroundColor='#FFF';
			ajax_tooltipObj_iframe.src = 'about:blank';
			contentDiv.appendChild(ajax_tooltipObj_iframe);
			ajax_tooltipObj_iframe.style.left = '0px';
			ajax_tooltipObj_iframe.style.top = '0px';
		}

			
	}
	// Find position of tooltip
	ajax_tooltipObj.style.display='block';
	ajax_loadContent('ajax_tooltip_content',externalFile);
	if(ajax_tooltip_MSIE){
		ajax_tooltipObj_iframe.style.width = ajax_tooltipObj.clientWidth + 'px';
		ajax_tooltipObj_iframe.style.height = ajax_tooltipObj.clientHeight + 'px';
	}

	ajax_positionTooltip(inputObj);
}

function ajax_positionTooltip(inputObj)
{
	var leftPos = (ajaxTooltip_getLeftPos(inputObj) + inputObj.offsetWidth);
	var topPos = ajaxTooltip_getTopPos(inputObj);
	
	/*
	var rightedge=ajax_tooltip_MSIE? document.body.clientWidth-leftPos : window.innerWidth-leftPos
	var bottomedge=ajax_tooltip_MSIE? document.body.clientHeight-topPos : window.innerHeight-topPos
	*/
	var tooltipWidth = document.getElementById('ajax_tooltip_content').offsetWidth +  document.getElementById('ajax_tooltip_arrow').offsetWidth; 
	// Dropping this reposition for now because of flickering
	//var offset = tooltipWidth - rightedge; 
	//if(offset>0)leftPos = Math.max(0,leftPos - offset - 5);
	
	ajax_tooltipObj.style.left = leftPos + 'px';
	ajax_tooltipObj.style.top = topPos + 'px';	
	
	
}

function ajax_hideTooltip()
{
	ajax_tooltipObj.style.display='none';
}

function ajaxTooltip_getTopPos(inputObj)
{		
  var returnValue = inputObj.offsetTop;
  while((inputObj = inputObj.offsetParent) != null){
  	if(inputObj.tagName!='HTML')returnValue += inputObj.offsetTop;
  }
  return returnValue;
}

function ajaxTooltip_getLeftPos(inputObj)
{
  var returnValue = inputObj.offsetLeft;
  while((inputObj = inputObj.offsetParent) != null){
  	if(inputObj.tagName!='HTML')returnValue += inputObj.offsetLeft;
  }
  return returnValue;
}