function HttpRequest()
{
    if(this==window)throw new Error(0,"HttpRequest is unable to call as a function.")
    var me=this;
       var asyncFlag=false;
       var typeFlag=false;
    var r;
    function onreadystatechange()
    {
        if(me.onreadystatechange)me.onreadystatechange.call(r);
        if(r.readyState==4)
        {
            if(Number(r.status)>=300)
            {
                if(me.onerror)me.onerror.call(r,new Error(0,"Http error:"+r.status+" "+r.statusText));
                if(typeFlag)r.onreadystatechange=Function.prototype;
                else r.onReadyStateChange=Function.prototype;
                r=null;
                return;
            }
            me.status=r.status;
            me.statusText=r.statusText;
            me.responseText=r.responseText;
            me.responseBody=r.responseBody;
            me.responseXML=r.responseXML;
            me.readyState=r.readyState;
            if(typeFlag)r.onreadystatechange=Function.prototype;
            else r.onReadyStateChange=Function.prototype;
            r=null;
            if(me.onfinish)me.onfinish();
        }
    }
    function creatHttpRequest(){
        var e;
        try{
            r=new window.XMLHttpRequest();
            typeFlag=true;
        } catch(e) {           
            var ActiveXName=[
                'MSXML2.XMLHttp.6.0',
                'MSXML2.XMLHttp.3.0',
                'MSXML2.XMLHttp.5.0',
                'MSXML2.XMLHttp.4.0',
                'Msxml2.XMLHTTP',
                'MSXML.XMLHttp',
                'Microsoft.XMLHTTP'
            ]
            function XMLHttpActiveX()
            {
                var e;
                for(var i=0;i<ActiveXName.length;i++)
                {
                    try{
                        var ret=new ActiveXObject(ActiveXName[i]);
                        typeFlag=false;
                    } catch(e) {
                        continue;
                    }
                    return ret;
                }
                throw {"message":"XMLHttp ActiveX Unsurported."};
            }
            try{
                r=new XMLHttpActiveX();
                typeFlag=false;
            } catch(e) {
                throw new Error(0,"XMLHttpRequest Unsurported.");
            }
        }
    }
    creatHttpRequest();

    this.abort=function(){
        r.abort();
    }
    this.getAllResponseHeaders=function(){
        r.getAllResponseHeaders();
    }
    this.getResponseHeader=function(Header){
        r.getResponseHeader(bstrHeader);
    }
    this.open=function(Method,Url,Async,User,Password){
        asyncFlag=Async;
        try{
            r.open(Method,Url,Async,User,Password);
        } catch(e) {
            if(me.onerror)me.onerror(e);
            else throw e;
        }
    }
    this.send=function(Body){
        try{
            if(typeFlag)r.onreadystatechange=onreadystatechange;
            else r.onReadyStateChange=onreadystatechange;

            r.send(Body);
            //alert("sended");
            if(!asyncFlag){
                this.status=r.status;
                this.statusText=r.statusText;
                this.responseText=r.responseText;
                this.responseBody=r.responseBody;
                this.responseXML=r.responseXML;
                this.readyState=r.readyState;

                if(typeFlag)r.onreadystatechange=Function.prototype;
                else r.onReadyStateChange=Function.prototype;

                r=null;
            }
        } catch(e) {
            if(me.onerror)me.onerror(e);
            else throw e;
        }
        //alert("sended");
    }
    this.setRequestHeader=function(Name,Value){
        r.setRequestHeader(Name,Value);
    }
}