/* 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 */

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 rssBoxTxt_readMore = 'Read More';
	var rssBoxOpenLinksInNewWindow = true;


	var rssBoxAjaxObjects = new Array();

	function changeSlide(boxId,secondBetweenSlides,slideIndex)
	{
		var el = document.getElementById(boxId);
		var divs = el.getElementsByTagName('DIV');
		if(slideIndex>0){
			divs[slideIndex-1].style.display='none';
		}else{
			divs[divs.length-1].style.display='none';
		}
		divs[slideIndex].style.display='block';
		slideIndex++;
		if(slideIndex>=divs.length)slideIndex = 0;
		setTimeout('changeSlide("' + boxId + '",' + secondBetweenSlides + ',' + slideIndex + ')',secondBetweenSlides*1000);

	}

	function openUrlInNewWindow()
	{
		var rssBoxWin = window.open(this.href);
		return false;
	}
	function showAjaxContent(ajaxIndex,boxId,secondBetweenSlides)
	{

		var rssContent = rssBoxAjaxObjects[ajaxIndex].response;
		tokens = rssContent.split(/\n\n/g);
		var destinationObj = document.getElementById(boxId);
		var headerTokens = tokens[0].split(/\n/g);
		if(headerTokens[0]=='0'){
			headerTokens[1] = '';
			headerTokens[0] = 'Invalid source';
		}


		for(var no=1;no<tokens.length;no++){	// Looping through RSS items
			var string = '';
			var itemTokens = tokens[no].split(/##/g);
			var div = document.createElement('DIV');
			if(no>1)div.style.display='none';
			destinationObj.appendChild(div);

			// Adding date
			var date = document.createElement('P');
			date.className='rssBoxDate';
			date.innerHTML = itemTokens[1];
			div.appendChild(date);

			// Adding heading
			var heading = document.createElement('P');
			heading.className = 'rssBoxHeading';
			heading.innerHTML = itemTokens[0];
			div.appendChild(heading);

			// Adding description
			var description = document.createElement('P');
			description.className='rssBoxDescription';
			description.innerHTML = itemTokens[2];
			div.appendChild(description);

			// Adding link
			var link = document.createElement('A');
			link.className = 'rssBoxLink';
			link.innerHTML = rssBoxTxt_readMore;
			link.href = itemTokens[3];
			if(rssBoxOpenLinksInNewWindow){
				link.onclick = openUrlInNewWindow;
			}
			div.appendChild(link);

		}

		setTimeout('changeSlide("' + boxId + '",' + secondBetweenSlides + ',1)',secondBetweenSlides*1000);




	}

	function insertAjaxContent(destinationId,url,maxItems,secondBetweenSlides)
	{
		var ajaxIndex = rssBoxAjaxObjects.length;
		rssBoxAjaxObjects[ajaxIndex] = new sack();
		rssBoxAjaxObjects[ajaxIndex].requestFile = 'http://payvand.com/rssbox/readRSS.php?rssURL=' + url + '&maxRssItems=' + maxItems;	// Specifying which file to get
		rssBoxAjaxObjects[ajaxIndex].onCompletion = function(){ showAjaxContent(ajaxIndex,destinationId,secondBetweenSlides); };	// Specify function that will be executed after file has been found
		rssBoxAjaxObjects[ajaxIndex].runAJAX();		// Execute AJAX function
	}

	function initRssBoxScript()
	{
		insertAjaxContent('rssBox','http://www.payvand.com/news/rssfeed_pop.xml',2,12);

	}