/*
	AJAXTools.js
	
	Created:  2.15.07
	Creator:  M. Kircher, Mainline Media LLC
	Modified: ---
	
*/

//var xmlHttp;
var action = "";

function createXMLHttpRequest(){
	if(window.ActiveXObject)	  {	xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");	}
	else if(window.XMLHttpRequest){	xmlHttp = new XMLHttpRequest();						}
}
function startRequest(url, method){
	createXMLHttpRequest();
	xmlHttp.onreadystatechange = handleStateChange;
	url = url+"&timestamp="+new Date().getTime();
	xmlHttp.open(method, url, true);
	if(method == "POST"){
		xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	}
	xmlHttp.send(null);
}
function handleStateChange(){
	if(xmlHttp.readyState == 4){
		if(xmlHttp.status == 200){
			//xmlHttp.responseXML;
		}
	}
}

/* --- RSS --- */

var RSSfeedDir 			= "feeds/"
var RSStemplateDir 		= "templates/";
var RSStemplateDefault 	= RSStemplateDir+"simple-template1.html";
var RSStemplate;

RSSRequest = function(id){
	this.id = id;
	if(window.ActiveXObject)	  {	this.xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");	}
	else if(window.XMLHttpRequest){	this.xmlHttp = new XMLHttpRequest();					}
}
RSSRequest.prototype.setDOMid = function(DOMid){
	this.DOMid = DOMid;
}

function getRSS(xmlfile, maxItems, template, id, isLocal){
	
	if(document.getElementById(id)){
		//determine template to use
		if(template != ""){ RSStemplate = RSStemplateDir+template; }
		else 			  { RSStemplate = RSStemplateDefault; }
		
		//determine path of xml file
		var xml = xmlfile;
		if(isLocal){ xml = RSSfeedDir+xmlfile; }
		
		//create RSSRequest object
		var url = "rss/rss2html.php?XMLFILE="+xml+"&TEMPLATE="+RSStemplate;				//create url for rss2html.php
		if(maxItems >= 0 && maxItems !== null){
			url +="&MAXITEMS="+maxItems;
		}
		var obj = new RSSRequest("rssRequest_"+new Date().getTime()+Math.random());		//create RSSRequest object w/ unique id
		obj.setDOMid(id);																//set DOM id for RSSRequest object
		
		//start RSSRequest object's request to server
		startRSSRequest(url, obj);
	}
}
function startRSSRequest(url, RSSReqObj){
	
	//set up handler object/function
	RSSReqObj.xmlHttp.onreadystatechange = function(){
		if(RSSReqObj.xmlHttp.readyState == 1){
		
			if(!document.getElementById(RSSReqObj.id+"_wait_icon")){
				var RSSwaitingIcon = createRSSwaitingIcon();
				RSSwaitingIcon.id = RSSReqObj.id+"_wait_icon";
				RSSwaitingIcon.setAttribute("class", "rss_wait_icon");
				RSSwaitingIcon.setAttribute("className", "rss_wait_icon");
				var container = document.getElementById(RSSReqObj.DOMid);
				if(container){
					container.appendChild(RSSwaitingIcon);
				}
			}
		}
		else if(RSSReqObj.xmlHttp.readyState == 4){
			removeRSSwaitingIcon(RSSReqObj.id+"_wait_icon");
			if(RSSReqObj.xmlHttp.status == 200){
				insertRSS(RSSReqObj);
			}
		}	
	}
	
	//create a unique url with timestamp
	url = url+"&timestamp="+new Date().getTime();	
	RSSReqObj.xmlHttp.open("POST", url, true);
	RSSReqObj.xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	RSSReqObj.xmlHttp.send(null);
}
function createRSSwaitingIcon(){
	var icon = document.createElement('img');
	icon.src = 'images/rss_waiting.gif';
	icon.alt = 'Loading RSS...';
	return icon;
}
function removeRSSwaitingIcon(id){
	var icon = document.getElementById(id);
	icon.parentNode.removeChild(icon);
}

function insertRSS(RSSReqObj){
	//insert formatted RSS2html.php response into DOM
	if(document.getElementById(RSSReqObj.DOMid)){
		document.getElementById(RSSReqObj.DOMid).innerHTML += RSSReqObj.xmlHttp.responseText;
	} else {
		var newContainer = document.createElement('div');
		var main_content = document.getElementById('main-content');
		newContainer.innerHTML = RSSReqObj.xmlHttp.responseText;
		main_content.appendChild(newContainer);
	}
	setColumnHeights();
}