用ajax实现读博客rss示例代码

代码如下:

<!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>
";
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>
</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>
<a href="javascript:readRSS('http://beginner.blogjava.net/rss.aspx')">blogjava新手区 </a>
<a href="javascript:readRSS('http://life.blogjava.net/rss.aspx')">blogjava非技术区 </a>
<a href="javascript:readRSS('http://general.blogjava.net/rss.aspx')">综合区 </a>

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>