ajax读rss示例

ajax读rss示例

<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd" >
< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head >
< title > this is test </ title >

< script  type ="text/javascript" >
var xmlHttp;

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

function readRSS(url) {
    createXMLHttpRequest();
    xmlHttp.onreadystatechange = handleStateChange;
    xmlHttp.open("GET", url, true);
    xmlHttp.send(null);
  
  
}
    
function handleStateChange() {
    if(xmlHttp.readyState == 4) {
        if(xmlHttp.status == 200) {
            ResultSet();
        }
    }
}

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><br>";
        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><br>";
       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 >
</ head >

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