用ajax解析rss简单例子

< script  language ="javascript" >

var bloglist=new Array();
var xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
function startload(){
    xmlHttp.open("GET","http://www.cnblogs.com/zwl12549/Rss.aspx",true);
xmlHttp.onreadystatechange=function(){
    if(xmlHttp.readystate==4 && xmlHttp.status==200){
        var xmldom=xmlHttp.responseXML;
        var channel=xmldom.documentElement.childNodes.item(0);
        var itemlist=channel.childNodes;
        for(var i=0;i<itemlist.length;i++){
            var node=itemlist.item(i);
            if(node.tagName=="title"){
                blogtitle.innerHTML=node.text;
            }
            if(node.tagName=="description"){
                blogdescription.innerHTML=node.text;
            }
            if(node.tagName=="generator"){
                bloggenerator.innerHTML=node.text;
            }
            if(node.tagName=="item"){
                bloglist[bloglist.length]=node.childNodes;
            }
        }
        showitem(bloglist[0]);
    }
}
xmlHttp.send(null);
}
function showitem(itemlist){
    for(var i=0;i<itemlist.length;i++){
        var node=itemlist.item(i);
        if(node.tagName=="title"){
            itemtitle.innerHTML=node.text;
        }
        if(node.tagName=="link"){
            itemlink.href=node.text;
        }
        if(node.tagName=="description"){
            description.innerHTML=node.text;
        }
        if(node.tagName=="author"){
            author.innerHTML=node.text;
        }
        if(node.tagName=="pubDate"){
            pubDate.innerHTML=node.text;
        }
    }
}
</ script >
< body  onload ="startload()" >
< font  color ="blue" >< a  id ="bloglink"  href ="#" >< div  id ="blogtitle" ></ div ></ a ></ font >< br  />
By  < font  color ="blue" >< div  id ="bloggenerator" ></ div ></ font >< br  />
< font  color ="blur" >< div  id ="blogdescription" ></ div ></ font >< br  />
< br  />
< font  color ="#000066" >< a  id ="itemlink"  href ="#" >< div  id ="itemtitle" ></ div ></ a ></ font >< br  />
By  < font  color ="blue" >< div  id ="author" ></ div ></ font >< br  />
< div  id ="description" ></ div >< br  />
< div  id ="pubDate"  align ="right" ></ div >
</ body >