用实现ajax读博客rss示例代码

function createXMLHttpRequest() { 
    if (window.ActiveXObject) { 
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); 
    }  
    else if (window.XMLHttpRequest) { 
        xmlHttp = new XMLHttpRequest(); 
    } 
}

function ResultSet() { 
    var results = xmlHttp.responseXML; 
    var title = null; 
    var item = null; 
    var link=null; 
    //得到channel 
    var ccc=results.getElementsByTagName("channel"); 
     var headtitle=ccc[0].getElementsByTagName("title")[0].firstChild.nodeValue; 
     var headlink=ccc[0].getElementsByTagName("link")[0].firstChild.nodeValue; 
     var cell = document.createElement("div"); 
        cell.innerHTML="<h1><a href="+headlink+" target=_blank>"+headtitle+"</a></h1>
"; 
        document.getElementById("result").appendChild(cell); 
       //得到items 
    var items = results.getElementsByTagName("item"); 
    for(var i = 0; i < items.length; i++) { 
        item = items[i]; 
        link=item.getElementsByTagName("link")[0].firstChild.nodeValue; 
        title = item.getElementsByTagName("title")[0].firstChild.nodeValue; 
        var cell = document.createElement("div"); 
        cell.innerHTML="<a href="+link+" target=_blank>"+title+"</a>
"; 
       document.getElementById("result").appendChild(cell); 
    }

} 
function readrss1() 
{ 
    var url=document.getElementById("txturl").value; 
    if(url=="") 
    { 
        alert("请输入RSS地址"); 
        } 
    else 
        { 
            readRSS(url); 
            } 
    }

</script>

<h1>ajax读rss示例</h1> 
  <form> 
       
  <a href="#">blogjava原创区 </a>&nbsp      
   <a href="#">blogjava新手区 </a> &nbsp  
    <a href="#">blogjava非技术区 </a> &nbsp  
     <a href="#">综合区 </a> 
     
 
     输入一个RSS地址:<input id="txturl" size="50" type="text" value="http://www.blogjava.net/wujun/rss.aspx"/> 
     <input onclick="readrss1()" type="button" value="查 看"/> 
      
  </form> 
    <div id="result"></div>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]