js使用ajax读博客rss示例_基础知识



代码如下:
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

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="

"+headtitle+"

";
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=""+title+"
";
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);
}
}

ajax读rss示例