/* Simple AJAX Code-Kit (SACK) v1.6.1 */
/* ©2005 Gregory Wild-Smith */
/* www.twilightuniverse.com */
/* Software licenced under a modified X11 licence,
   see documentation or authors website for more details */

/* DarkSage Content Javascript Xml
 * by DarkSage
 * www.darksage.fr
 */

var obj = null;
var jsFiles = null;

function dcjx(url) 
{
	return !makeRequest(url,"content",'GET',null);
}

function advdcjx(url,destination) 
{
	return !makeRequest(url,destination,'GET',null);
}

function initLinks(start)
{
	var elements = start.getElementsByTagName("a");
	for( var i = elements.length - 1; i >= 0; i-- )
	{
		if( elements[i].className == "dal" )
		{
			elements[i].className = "";
			elements[i].onclick = function(){return dcjx(this.href);}
		}
	}
}

window.onload = function(){initLinks(document);}

function postdcjx(url,destination,data)
{
	obj = new sack();
	obj.method = 'POST';
	obj.requestFile = url + ".php?ajax=1";
	obj.data = data;
	obj.onCompletion = function() { showContent(destination); };
	return !obj.runAJAX();
}

function makeRequest(url,destination,mode,data) 
{
	var advUrl = url.split("?");
	obj = new sack();
	obj.method = mode;
	obj.requestFile = advUrl[0];
	obj.setVar("ajax","1");
	obj.urlparameters = advUrl[1];
	obj.preventCaching = false; 
	obj.data = data;
	obj.onCompletion = function() { showContent(destination); };
	return obj.runAJAX();
}

function showContent(divId)
{
	var target = document.getElementById(divId);
	unloadScriptsAndCss(target)
	target.innerHTML = obj.response;
	obj = null;
	initLinks(target);
	loadScriptsAndCss(target);
}

function loadScriptsAndCss(start)
{
	var elements = start.getElementsByTagName("script");
	for( var i = 0; i < elements.length; i++ )
	{
		loadJsFile( elements[i].src );
		if( jsFiles == null )
		{
			jsFiles = new Array();
		}
		jsFiles.push( elements[i].src );
	}
	try
	{
		window.fireEvent("domReady");
	}
	catch(e) {}
}

// n : fileName | t : fileType
function loadJsFile(n)
{
	//if( t == "js" )
	{
		var ref = document.createElement('script');
		ref.setAttribute("type","text/javascript");
		ref.setAttribute("src", n);
	}
	/*
	else if( t == "css" )
	{ //if filename is an external CSS file
		var ref=document.createElement("link");
		ref.setAttribute("rel", "stylesheet");
		ref.setAttribute("type", "text/css");
		ref.setAttribute("href", n);
	}
	*/
	if (typeof ref!="undefined")
		document.getElementsByTagName("head")[0].appendChild(ref);
}

function unloadScriptsAndCss(start)
{
	if( jsFiles != null )
	{
		var src = jsFiles.pop();
		while( src != null )
		{
			unloadJsFile( src );
			src = jsFiles.pop();
		}
		jsFiles = null;
	}
/*
	var elements = start.getElementsByTagName("script");
	for( var i = elements.length - 1; i >= 0; i-- )
	{
		unloadJsFile( elements[i].src );
	}
*/
}

// n : fileName | t : fileType
function unloadJsFile(n)
{
	//determine element type to create nodelist from
	//var tge = (t=="js") ? "script" : (t=="css")? "link" : "none" 
	var tge = "script";

	//determine corresponding attribute to test for
	//var tga = (t=="js") ? "src" : (t=="css") ? "href" : "none" 
	var tga = "src";

	var all = document.getElementsByTagName(tge)
	for (var i = all.length; i >= 0; i--)
	{ 
		//search backwards within nodelist for matching elements to remove
		//remove element by calling parentNode.removeChild()
		if (all[i] && all[i].getAttribute(tga) != null && all[i].getAttribute(tga).indexOf(n) != -1)
			all[i].parentNode.removeChild(all[i]) 
	}	
}

function sack(file) {
	this.xmlhttp = null;

	this.resetData = function() {
		this.method = "POST";
  		this.queryStringSeparator = "?";
		this.argumentSeparator = "&";
		this.URLString = "";
		this.encodeURIString = false;
  		this.execute = false;
  		this.element = null;
		this.elementObj = null;
		this.requestFile = file;
		this.vars = new Object();
		this.urlparameters = null;
		this.preventCaching = true;
		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
		if( this.preventCaching )
			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);
		}
		if( this.urlparameters )
		{
			this.URLString += "&" + this.urlparameters;
		}
	}

	this.runResponse = function() {
		eval(this.response);
	}

	this.runAJAX = function(urlstring) {
		var ret = true;

		if (this.failed) {
			this.onFail();
			ret = false;
		} 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 {
					totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
					this.xmlhttp.open(this.method, totalurlstring, 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 = "";
							/* These lines were added by Alf Magne Kalleland ref. info on the sack home page. It prevents memory leakage in IE */

							delete self.xmlhttp['onreadystatechange'];
							self.xmlhttp=null;
							self.responseStatus=null;
							self.response=null;
							self.responseXML=null;
														
							break;
					}
				};

				this.xmlhttp.send(this.data);
				return ret;
			}
		}
	};

	this.reset();
	this.createAJAX();
}