function sack(file) {
	this.xmlhttp = null;
	this.resetData = function() {
		this.method = "POST";
  		this.queryStringSeparator = "?";
		this.argumentSeparator = "&";
		this.URLString = "";
		this.encodeURIString = true;
  		this.execute = false;
  		this.element = null;
		this.elementObj = null;
		this.requestFile = file;
		this.vars = new Object();
		this.responseStatus = new Array(2);
  	};
	this.resetFunctions = function() {
  		this.onLoading = function() { };
  		this.onLoaded = function() { };
  		this.onInteractive = function() { };
  		this.onCompletion = function() { };
  		this.onError = function() { };
		this.onFail = function() { };
	};
	this.reset = function() {
		this.resetFunctions();
		this.resetData();
	};
	this.createAJAX = function() {
		try {
			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e1) {
			try {
				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e2) {
				this.xmlhttp = null;
			}
		}
		if (! this.xmlhttp) {
			if (typeof XMLHttpRequest != "undefined") {
				this.xmlhttp = new XMLHttpRequest();
			} else {
				this.failed = true;
			}
		}
	};
	this.setVar = function(name, value){
		this.vars[name] = Array(value, false);
	};
	this.encVar = function(name, value, returnvars) {
		if (true == returnvars) {
			return Array(encodeURIComponent(name), encodeURIComponent(value));
		} else {
			this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);
		}
	}
	this.processURLString = function(string, encode) {
		encoded = encodeURIComponent(this.argumentSeparator);
		regexp = new RegExp(this.argumentSeparator + "|" + encoded);
		varArray = string.split(regexp);
		for (i = 0; i < varArray.length; i++){
			urlVars = varArray[i].split("=");
			if (true == encode){
				this.encVar(urlVars[0], urlVars[1]);
			} else {
				this.setVar(urlVars[0], urlVars[1]);
			}
		}
	}
	this.createURLString = function(urlstring) {
		if (this.encodeURIString && this.URLString.length) {
			this.processURLString(this.URLString, true);
		}
		if (urlstring) {
			if (this.URLString.length) {
				this.URLString += this.argumentSeparator + urlstring;
			} else {
				this.URLString = urlstring;
			}
		}
		// prevents caching of URLString
		this.setVar("rndval", new Date().getTime());
		urlstringtemp = new Array();
		for (key in this.vars) {
			if (false == this.vars[key][1] && true == this.encodeURIString) {
				encoded = this.encVar(key, this.vars[key][0], true);
				delete this.vars[key];
				this.vars[encoded[0]] = Array(encoded[1], true);
				key = encoded[0];
			}
			urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];
		}
		if (urlstring){
			this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);
		} else {
			this.URLString += urlstringtemp.join(this.argumentSeparator);
		}
	}
	this.runResponse = function() {
		eval(this.response);
	}
	this.runAJAX = function(urlstring) {
		if (this.failed) {
			this.onFail();
		} else {
			this.createURLString(urlstring);
			if (this.element) {
				this.elementObj = document.getElementById(this.element);
			}
			if (this.xmlhttp) {
				var self = this;
				if (this.method == "GET") {
					totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
					this.xmlhttp.open(this.method, totalurlstring, true);
				} else {
					this.xmlhttp.open(this.method, this.requestFile, true);
					try {
						this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
					} catch (e) { }
				}
				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;
							if (self.execute) {
								self.runResponse();
							}
							if (self.elementObj) {
								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;
								}
							}
							if (self.responseStatus[0] == "200") {
								self.onCompletion();
							} else {
								self.onError();
							}
							self.URLString = "";
							break;
					}
				};
				this.xmlhttp.send(this.URLString);
			}
		}
	};
	this.reset();
	this.createAJAX();
}

var currentlyActiveInputRef = false;
var currentlyActiveInputClassName = false;

function highlightActiveInput(){
	if(currentlyActiveInputRef){
		currentlyActiveInputRef.className = currentlyActiveInputClassName;
	}
	currentlyActiveInputClassName = this.className;
	this.className = 'inputHighlighted';
	currentlyActiveInputRef = this;
}

function blurActiveInput(){
	this.className = currentlyActiveInputClassName;
}

function initInputHighlightScript(){
	var tags = ['INPUT','TEXTAREA'];
	for(tagCounter=0;tagCounter<tags.length;tagCounter++){
		var inputs = document.getElementsByTagName(tags[tagCounter]);
		for(var no=0;no<inputs.length;no++){
			if(inputs[no].className && inputs[no].className=='doNotHighlightThisInput')continue;
			
			if(inputs[no].tagName.toLowerCase()=='textarea' || (inputs[no].tagName.toLowerCase()=='input' && inputs[no].type.toLowerCase()=='text')){
				inputs[no].onfocus = highlightActiveInput;
				inputs[no].onblur = blurActiveInput;
			}
		}
	}
}

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/loading.gif" />Loading content - please wait';
	dynamicContent_ajaxObjects[ajaxIndex] = new sack();
	dynamicContent_ajaxObjects[ajaxIndex].requestFile = url;
	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();
}

var x_offset_tooltip = 5;
var y_offset_tooltip = 0;
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){
		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');
		leftDiv.className='ajax_tooltip_arrow';
		leftDiv.id = 'ajax_tooltip_arrow';
		ajax_tooltipObj.appendChild(leftDiv);
		var contentDiv = document.createElement('DIV');
		contentDiv.className = 'ajax_tooltip_content';
		ajax_tooltipObj.appendChild(contentDiv);
		contentDiv.id = 'ajax_tooltip_content';	
		if(ajax_tooltip_MSIE){
			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';
		}
	}
	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 tooltipWidth = document.getElementById('ajax_tooltip_content').offsetWidth +  document.getElementById('ajax_tooltip_arrow').offsetWidth; 
	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-100;
}

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