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var Simple=new Object();

Simple.Ajax=function(type,url,onload,params,contentType){

    this.req=null;

    this.url=url;

    this.params=params;

    if(type){

        this.type=type;

    }else{

        this.type="GET";

    }

    if(!contentType && type=="POST"){

        this.contentType="application/x-www-form-urlencoded; charset=gb2312";

    }else{

        this.contentType=contentType;

    }

    this.onload=onload;

    this.responseText=null;

    this.GetHttpRequest();

}



Simple.Ajax.prototype.GetHttpRequest=function(){

    if(window.ActiveXObject){

        this.req=new ActiveXObject("Microsoft.XMLHTTP");

    }else if(window.XMLHttpRequest){

        this.req=new XMLHttpRequest();

    }

}



Simple.Ajax.prototype.SendRequest=function(){

    var loader=this;

    this.req.onreadystatechange=function(){

        loader.OnReadyState.call(loader);

    }

    this.req.open(this.type,this.url,true);

    if(this.contentType){

        this.req.setRequestHeader("Content-Type",this.contentType);

    }

    this.req.send(this.params);

}



Simple.Ajax.prototype.OnReadyState=function(){

    var ready=this.req.readyState;

    var data;

    if(ready==4){

        if(this.req.status==200 || this.req.status==0){

            this.responseText=this.req.responseText;

        }else{

            this.responseText="false";

        }

    }else{

        this.responseText="load";

    }

    this.onload.call(this,this);

}