var xmlPending = false;
//based on prototype's ajax class
//to be used with prototype.lite, moofx.mad4milk.net.
//updated by andre, webeffekt.no
var ajax = Class.create();
ajax.prototype = {
	initialize: function(url, options){
		if (xmlPending) return;
		xmlPending = true;
		this.transport = this.getTransport();
		this.callbackDiv = options.callbackDiv || null;
		this.callbackFunction = options.callbackFunction || null;
		this.postBody = options.postBody || null;
		this.method = (options.method) ? options.method.toUpperCase() : 'GET';
		this.onComplete = options.onComplete || null;
		this.update = (options.update) ? $(options.update) || null: null;
		this.request(url);
	},

	request: function(url){
		this.transport.open(this.method, url, true);
		this.transport.onreadystatechange = this.onStateChange.bind(this);
		if (this.method == 'POST') {
			this.transport.setRequestHeader('Content-type', 'application/x-www-form-urlencoded; charset=UTF-8');
			if (this.transport.overrideMimeType) this.transport.setRequestHeader('Connection', 'close');
		}
		this.transport.send(this.postBody);
	},

	onStateChange: function(){
		if (this.transport.readyState == 4 && (this.transport.status == 200 || this.transport.status == 0)) {
			xmlPending = false;
			if (this.onComplete) 
			{
				setTimeout(function(){this.onComplete(this);}.bind(this), 10);
			}
			else if (this.update)
			{
				var oTmp = this.transport.responseXML.getElementsByTagName('description')
				if (oTmp.length == 1)
					this.descHTML = oTmp[0].firstChild.data;
				setTimeout(function(){this.update.innerHTML = this.descHTML;}.bind(this), 10);
				//setTimeout(function(){this.update.innerHTML = this.transport.responseText;}.bind(this), 10);
			}
			this.transport.onreadystatechange = function(){};
		}
		else if (this.transport.readyState == 4) {
			xmlPending = false;
			alert(this.transport.status + ':' + this.transport.statusText);
		}
	},

	getTransport: function() {
		if (window.ActiveXObject){
			var types = ['MSXML2.XMLHTTP','Microsoft.XMLHTTP'];
			for (var i = 0; i < types.length; i++) {
				try { return new ActiveXObject(types[i]);
				} catch(e) {}
			}
			return false;
		} else if (window.XMLHttpRequest){
			return new XMLHttpRequest();
		}else{return false;}
	}
};