var XMLHttpArray = [
        function() {return new XMLHttpRequest()},
        function() {return new ActiveXObject("Msxml2.XMLHTTP")},
        function() {return new ActiveXObject("Msxml2.XMLHTTP")},
        function() {return new ActiveXObject("Microsoft.XMLHTTP")}
];
function createXMLHTTPObject(){
        var xmlhttp = false;
        for(var i=0; i<XMLHttpArray.length; i++){
                try{
                        xmlhttp = XMLHttpArray[i]();
                }catch(e){
                        continue;
                }
                break;
        }
        return xmlhttp;
}////
function AjaxRequest(url,callback,method,params){
        var req = createXMLHTTPObject();
        req.onreadystatechange= function(){
                if(req.readyState != 4) return;
                if(req.status != 200) return;
                callback(req);
        }
        req.open(method,url,true);
		req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		req.setRequestHeader("Content-length", params.length);
		req.setRequestHeader("Connection", "close");
        req.setRequestHeader('User-Agent', '811 Ajax');
        req.send(params);
}////