// Ajax 文件
//构建Ajax
var http_request=false; 
function create_request()
{
  var ht_re = false;
  //构建XMLHttpRequest实例
  try {
    if( window.ActiveXObject ) { // IE　浏览器
      for( var i = 5; i; i-- ){
        try{ 
          if( i == 2 ){ 
            ht_re = new ActiveXObject( "Microsoft.XMLHTTP" );
          }else{
            ht_re = new ActiveXObject( "Msxml2.XMLHTTP." + i + ".0" );
          } 
          break;
        }
        catch(e){
          ht_re = false;
        }
      }
    }else if( window.XMLHttpRequest ){//Mozilla 浏览器
      ht_re = new XMLHttpRequest();
      if (ht_re.overrideMimeType){//设置其请求头
        ht_re.overrideMimeType('text/xml');
      }
    }
  }catch(e){ ht_re = false;this.treatEx(); }

  if (!ht_re) { // 构建实例失败
    window.alert("构建XMLHttpRequest失败！");
    return false;
  }
  return ht_re;  
}      
function send_request(ourl,surl)
{  //de
   http_request=create_request();
   if(!http_request)
   {
       window.alert("不能够创建XMLHttpRequest对象！");
       return false; 
   }
//   debugger;
   http_request.onreadystatechange=processRequest;
   http_request.open("POST",ourl,true);
   http_request.send(surl);
  
}