//dependencies : none 
var kAjax = {
	request : function(p){
		/*p = {
		url : '', //url of xml document
		onSuccess : function(xmlNode,xmlText){}, //event called when document loaded successfully
		onError : function(errCode, responseStatus){}, //event called when document loaded erroneously
		eventContext : [object], //object to run onSuccess and onError functions in the context of
		postType : '', //GET or POST
		postData : '' //post data as a string (ex: &name=escapedvalue&name2=escapedvalue2)
		}*/
		if(!p)return;		
		if(typeof p['url'] != "string")p.url = '';
		if(typeof p['postType'] != 'string')p.postType="GET";
		if(typeof p['postData'] != 'string')p.postData = "";
		if(typeof p['eventContext'] != 'object')p.eventContext = window;
		if(typeof p['onSuccess'] != "function")p.onSuccess = function(){};
		if(typeof p['onError'] != "function")p.onError = function(){};
		var r = null; //the xml request object
		var ok = false; //xml request object instanstiated
		if(!ok){try{r=new XMLHttpRequest();ok=true;}catch(e){ok=false;}}
		if(!ok){try{r=new ActiveXObject("Msxml2.XMLHTTP");ok=true;}catch(e){ok=false;}}
		if(!ok){try{r=new ActiveXObject("Microsoft.XMLHTTP");ok=true;}catch(e){ok=false;}}
		if(ok){
			r.onreadystatechange = function(){
				if(r.readyState==4){
					if(r.status==200){
						p.onSuccess.call(p.eventContext, r.responseXML, r.responseText);
					}else{
						p.onError.call(p.eventContext, kAjax.ERROR_RESPONSE_STATUS, r.status);
					}
					p = null;
					r = null;
				}
			};
			try{
				r.open(p.postType,p.url,true);
				r.send(p.postData);
			}catch(e){
				p.onError.call(p.eventContext, this.ERROR_URL_UNAVAILABLE,0);
				p = null;
				r = null;
			}
		}else{
			p.onError.call(p.eventContext, this.ERROR_FEATURE_UNAVAILABLE,0);
			p = null;
			r = null;
		}
		ok = null;
	},
	ERROR_FEATURE_UNAVAILABLE : 1, //unable to create the XMLHTTPRequest object
	ERROR_RESPONSE_STATUS : 2, //response status of page != 200
	ERROR_URL_UNAVAILABLE : 3 //XMLHTTPRequest.open failed
};