var http_request=false;
var reobj = '';
  function send_request(url){//初始化，指定处理函数，发送请求的函数
    http_request=false;
    //开始初始化XMLHttpRequest对象
    if(window.XMLHttpRequest){//Mozilla浏览器
     http_request=new XMLHttpRequest();
     if(http_request.overrideMimeType){//设置MIME类别
       http_request.overrideMimeType("text/xml");
     }
    }
    else if(window.ActiveXObject){//IE浏览器
     try{
      http_request=new ActiveXObject("Msxml2.XMLHttp");
     }catch(e){
      try{
      http_request=new ActiveXobject("Microsoft.XMLHttp");
      }catch(e){}
     }
    }
    if(!http_request){//异常，创建对象实例失败
     window.alert("创建XMLHttp对象失败！");
     return false;
    }
    http_request.onreadystatechange=processrequest;
    //确定发送请求方式，URL，及是否同步执行下段代码
    http_request.open("GET",url,true);
    http_request.send(null);
  }
  //处理返回信息的函数
  function processrequest(){
   if(http_request.readyState==4){//判断对象状态
     if(http_request.status==200){//信息已成功返回，开始处理信息
      document.getElementById(reobj).innerHTML=http_request.responseText;
     }
     else{//页面不正常
      alert("您所请求的页面不正常！");
     }
   }
  }
  function doabout_articles(obj,artid){
   var url = '/about_articles.php?id='+ artid;
   document.getElementById(obj).innerHTML="正在读取数据...";
   reobj = obj;
   send_request(url);
  }
  function getChildSort(obj,sid){
   var url = '/do_getchildsort.php?sortid='+ sid;
   document.getElementById(obj).innerHTML="正在读取数据...";
   reobj = obj;
   send_request(url);
  }
  function getKeyWord(obj){
   var url = '/website_js/index_gjc.html';
   document.getElementById(obj).innerHTML="正在读取数据...";
   reobj = obj;
   send_request(url);
  }
  function ck_getKeyWord(){
	 var tmp = document.getElementById('keyword').innerHTML;
	 if(tmp=='' || tmp=='正在读取数据...'){
		 getKeyWord('keyword');
	 }
  }