<script language="javascript">
var xmlhttp = false;
========test.html=============
function createXMLHttpRequest()
{
if (window.ActiveXObject)
{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest)
{
xmlhttp = new XMLHttpRequest();
}
}
function startRequest(n)
{
var a=Math.round(Math.random()*1000);
var url = "data1.xml";
createXMLHttpRequest();
xmlhttp.open("GET",url,true);
//必须在open方法后调用下面这句才能强制更新
xmlhttp.setRequestHeader("If-Modified-Since","0");
xmlhttp.onreadystatechange = checkusername;
xmlhttp.send(null);
}
function checkusername() {
if (xmlhttp.readystate == 4){
if (xmlhttp.status == 200){
feedlist();
}
}
}
function feedlist() {
var xmldoc = xmlhttp.responseXML;
RemoveRow();
for (var i = 0 ; i < 3; i++) {
var xmltitle = xmldoc.getElementsByTagName("job")[i].firstChild.data;
var xmllink = xmldoc.getElementsByTagName("salary")[i].firstChild.data;
row1 = tb.insertRow();
cell1 = row1.insertCell();
cell1.innerHTML = xmltitle;
cell2 = row1.insertCell();
cell2.innerHTML = xmllink;
}
}
function RemoveRow()
{
//保留第一行表头,其余数据均删除.
var iRows = tb.rows.length;
for(var i=0;i<iRows-1;i++)
{
tb.deleteRow(1);
}
}
function MyShow()
{
//2秒自动刷新一次,2秒取得一次数据.
var timer = window.setInterval("startRequest()",3000);
}
</script>
<html>
<body onload="MyShow()">
<p>
</p>
<table width="47%" height="23"border="0" cellpadding="1" cellspacing="0" id="tb">
<tr>
<td>Main Grabber</td>
<td>Backup Grabber</td>
</tr>
</table>
</html>
===========data1.xml====================
<?xml version="1.0" encoding="gb2312"?>
<employees>
<employee name="Billgates">
<job>Programmer</job>
<salary>32768</salary>
</employee>
<employee name="王涛">
<job>无业111游民</job>
<salary>7005e</salary>
</employee>
<employee name="Big 中华">
<job>哈尔滨CEO</job>
<salary>16776500</salary>
</employee>
</employees>