用.net 处理xmlHttp发送异步请求

net.xmlHttp.prototype.loadXMLDoc=function(url, params, method, contentType){
  if (!method){
    method="GET";
  }
  if (!contentType && method=="POST"){
    contentType='application/x-www-form-urlencoded';
  }
  if (window.XmlHttpRequest){
    this.req=new XmlHttpRequest();
  } else if (window.ActiveXObject){
    this.req=new ActiveXObject("Microsoft.xmlHttp");
  }
  if (this.req){
    try{
      var loader=this;
      this.req.onreadystatechange=function(){
        net.xmlHttp.onReadyState.call(loader);
      }
      this.req.open(method,url,true);
      if (contentType){
        this.req.setRequestHeader('Content-Type', contentType);
      }
      this.req.send(params);
    }catch (err){
      this.onerror.call(this);
    }
  }
}

net.xmlHttp.onReadyState=function(){
  var req=this.req;
  var ready=req.readyState;
  if (ready==net.READY_STATE_COMPLETE){
    var httpStatus=req.status;
    if (httpStatus==200 httpStatus==0){
      this.onload.call(this);
    }else{
      this.onerror.call(this);
    }
  }
}

net.xmlHttp.prototype.defaultError=function(){
  alert("error fetching data!"
    +"\n\nreadyState:"+this.req.readyState
    +"\nstatus: "+this.req.status
    +"\nheaders: "+this.req.getAllResponseHeaders());
}

下面开始写发送xmlHttp请求的代码：

default.js
//全局xmlHttp对象
var cobj;

/**//* Post begin*/
//绑定Post发送xmlHttp事件到btnTestPost
function loadTestPost()
{
   var iobj = document.getElementById("btnTestPost");
   //btnTestPost按钮监听的绑定
   var clickRouter=new jsEvent.EventRouter(iobj,"onclick");
   clickRouter.addListener(btnTestPostClick);

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