function __getXmlHTTP(){
	if(typeof XMLHttpRequest!="undefined"){
		return new XMLHttpRequest();
	}
	else if(typeof ActiveXObject != "undefined")
	{
		try{
			var xmlhttp= new ActiveXObject("Microsoft.XMLHTTP");
			return xmlhttp;
		}
		catch(e)
		{
			return null;
		}
	}
	return null;
}
function _ajax(url) {
	//alert(url);
	xmlReq=__getXmlHTTP();
	xmlReq.open("GET", url, true)
	xmlReq.onreadystatechange=function(){
		if(xmlReq.readyState==4){
			var xmlDoc = xmlReq.responseText;
			//alert(xmlDoc);
			eval(xmlDoc);

		}
	}
	xmlReq.send(null);
}