// JavaScript Document
var aok = true;

var articleIndexContainer = 'IA_container';
var articleIndexContainer_old = 'IA_container_new';

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 = elemNodeName.toLowerCase();
								if (elemNodeName == "input"
								|| elemNodeName == "option"
								|| elemNodeName == "textarea") {
									self.elementObj.value = self.response;
								} else if (elemNodeName == "select"){
									clearListBox(self.elementObj);
									var tagRecords = self.responseXML.getElementsByTagName("record");
									for (i=0; i<tagRecords.length; i++){
										var record = tagRecords[i];
										var sValue = record.getElementsByTagName("id")[0].firstChild.nodeValue;
										var sText = record.getElementsByTagName("text")[0].firstChild.nodeValue;
										addSelectItem(self.elementObj, sText, sValue);
									}
									if (tagRecords.length == 0) {
										addSelectItem(self.elementObj, 'None Available', '0');
									}
								} 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 ajax = new sack();
var ajaxHolder = '';
/*
var articleListObj;
var activeArticle = false;
var clickedArticle = false;
var contentObj	// Reference to article content <div>
*/
function ajaxLoadLink(link, holder, extra_link) {
	var link_ref = link.href;
	if (extra_link != undefined) {
		link_ref += '&'+extra_link;
	}
	getAjaxFile(holder, link_ref);
	ajaxHolder = holder;
	return false;
}

function ajaxLoadURL(url, holder, extra_link) {
	if (extra_link != undefined) {
		url += '&'+extra_link;
	}
	getAjaxFile(holder, url);
	ajaxHolder = holder;
	return false;
}

function getAjaxURL(url, extra_link) {
	if (url.indexOf('mode=ajax') < 1) {
		url += '&mode=ajax';
	}
	if (extra_link != undefined) {
		url += '&'+extra_link;
	}
	return url;
}

function showContent()	// Displaying content in the content <div>
{
//	contentObj.innerHTML = ajax.response;	// ajax.response is a variable that contains the content of the external file	
	document.getElementById('processImage').style.display = 'none';

	ajax.elementObj = '';
}

function showWaitMessage()
{
//	document.getElementById('processImage').style.display = 'block';
}

function getAjaxFile(holder, fileName, completionFunction)
{
	if (completionFunction == undefined) {
		completionFunction = showContent;
	}
	ajax.elementObj = document.getElementById(holder);
	ajax.requestFile = fileName;	// Specifying which file to get
	ajax.onCompletion = completionFunction;	// Specify function that will be executed after file has been found
	ajax.onLoading = showWaitMessage;	// Action when AJAX is loading the file
	ajax.runAJAX();		// Execute AJAX function
	return false;
}

function getformvalues (fobj) {
	var str = "";
	aok = true;
	var val;
	for (var i = 0; i < fobj.elements.length; i++) {
		str += fobj.elements[i].name + "=" + escape(fobj.elements[i].value) + "&";
	}
	return str;
}

function ajaxSubmitForm(frm, holder, extra_link) {
	url = getAjaxURL(frm.action, extra_link);
	ajax.URLString = '';
	switch(frm.method) {
		case 'post':
		case 'POST':
		case 'Post':
			ajax.method = "POST";
/*			ajax.URLString = getformvalues(frm);*/
		break;
		case 'get':
		case 'GET':
		case 'Get':
			ajax.method = "GET";
		break;
	}
	
	ajax.elementObj = document.getElementById(holder);
	ajax.requestFile = url;	// Specifying which file to get
	ajax.onCompletion = showContent;	// Specify function that will be executed after file has been found
	ajax.onLoading = showWaitMessage;	// Action when AJAX is loading the file
	ajax.runAJAX(getformvalues(frm));		// Execute AJAX function
	return false;
}

function clearListBox (LBox) {
	for (var q=LBox.options.length; q>=0; q--) {
	  LBox.options[q] = null;
	}
}
function addSelectItem (selObj, text, id) {
	var opt = document.createElement("option");
	opt.text = text;
	opt.value = id;
	try {
		selObj.add(opt, null);
	}
	catch(ex) {
		selObj.add(opt);
	}
}

function getIndexArticle(filename) {
	document.getElementById(articleIndexContainer).style.zIndex = '1';
	articleIndexContainer_old = articleIndexContainer;
	switch (articleIndexContainer) {
		case 'IA_container':
			articleIndexContainer = 'IA_container_new';
		break;
		case 'IA_container_new':
			articleIndexContainer = 'IA_container';
		break;
	}
	var indexContainerStyle = document.getElementById(articleIndexContainer).style;
	indexContainerStyle.zIndex = '0';
	indexContainerStyle.opacity = '0';
	return getAjaxFile(articleIndexContainer, filename, fadeInArticles);
}
function fadeInArticles() {
	document.getElementById('processImage').style.display = 'none';
	Effect.Appear(articleIndexContainer);
	Effect.Fade(articleIndexContainer_old);
}

function getCategoryListing(filename, level, callLink) {
	var parentTable = document.getElementById('index_category_holder-'+(level-1));
	var links = parentTable.getElementsByTagName('a');
	for(var l=0; l<links.length; l++) {
		links[l].style.fontWeight = 'normal';
	}
	callLink.style.fontWeight = 'bold';
	var ContainerStyle = document.getElementById('index_category_holder-'+level).style;
	return getAjaxFile('index_category_holder-'+level, filename);
}