JS解析XML的实现代码

<script language="javascript" type="text/javascript">
//需要读取的xml文件
var uRl = "jsReadXml.xml";
var xmlDoc;
//初始化，给上述定义变量赋值
// function showcurcity(){
if(window.ActiveXObject)
{
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async="false"
xmlDoc.load(uRl);
getvalue();
}
else if(document.implementation && document.implementation.createDocument)
{
xmlDoc=document.implementation.createDocument("", "root", null);
xmlDoc.load(uRl);
xmlDoc.onload=getvalueff;
}
// else {
// return null;
// }
// }
function getvalue()
{
var nodes=xmlDoc.documentElement.childNodes;
var now=new Date();
for(i=0;i<nodes.length;i++){
var value=nodes.item(i).childNodes.item(0).text ;
alert(nodes.item(i).childNodes.item(1).text);
alert(nodes.item(i).childNodes.item(2).text);
}
}
function getvalueff(){
var cCode=xmlDoc.getElementsByTagName("date");
var now = new Date();
var nowvalue=now.getFullYear()+'年'+(now.getMonth()+1)+'月'+now.getDate()+'日';
for(i=0;i<cCode.length;i++)
{
alert(xmlDoc.getElementsByTagName("imgsrc")[i].childNodes[0].nodeValue);
alert(xmlDoc.getElementsByTagName("title")[i].childNodes[0].nodeValue);
alert(xmlDoc.getElementsByTagName("url")[i].childNodes[0].nodeValue);
}
}
</script>

<?xml version="1.0" encoding="UTF-8" ?>
<root>
<imags>
<imgsrc>images/ad-01.jpg</imgsrc>
<title>胡志明市</title>
<url>http://torchrelay.beijing2008.cn/cn/journey/hochiminhcity/</url>
</imags>
<imags>
<imgsrc>images/ad-02.jpg</imgsrc>
<title>香港2</title>
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url>
</imags>
<imags>
<imgsrc>images/ad-03.jpg</imgsrc>
<title>香港3</title>
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url>
</imags>
<imags>
<imgsrc>images/ad-04.jpg</imgsrc>
<title>香港4</title>
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url>
</imags>
<imags>
<imgsrc>images/ad-05.jpg</imgsrc>
<title>香港5</title>
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url>
</imags>
</root>

<script language="javascript" type="text/javascript">
var xmlDoc;
function showcurcity()
{
if(window.ActiveXObject)
{
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async="false"
xmlDoc.load("OlyCity.xml");
getvalue();
}
else if(document.implementation && document.implementation.createDocument)
{
xmlDoc=document.implementation.createDocument("", "root", null);
xmlDoc.load('OlyCity.xml');
xmlDoc.onload=getvalueff;
}
else
{
return null;
}
}
function getvalue()
{
var nodes=xmlDoc.documentElement.childNodes;
var now=new Date();
for(i=0;i<nodes.length;i++){
var value=nodes.item(i).childNodes.item(0).text ;
if(value==now.toLocaleDateString())
{
window.document.getElementById('curcity').innerText=nodes.item(i).childNodes.item(1).text;
window.document.getElementById('curcity').href =nodes.item(i).childNodes.item(2).text;
}
}
}
function getvalueff(){
var cCode=xmlDoc.getElementsByTagName("date");
var now = new Date();
var nowvalue=now.getFullYear()+'年'+(now.getMonth()+1)+'月'+now.getDate()+'日';
for(i=0;i<cCode.length;i++)
{
var value=cCode[i].childNodes[0].nodeValue;
if(value==nowvalue)
{
window.document.getElementById('curcity').href =xmlDoc.getElementsByTagName("url")[i].childNodes[0].nodeValue;;
window.document.getElementById('curcity').childNodes[0].nodeValue=xmlDoc.getElementsByTagName("city")[i].childNodes[0].nodeValue;
}
}
}
setInterval(showcurcity,1000);
</script>

<?xml version="1.0" encoding="gb2312" ?>
<root>
<citymessage>
<date>2008年4月29日</date>
<city>胡志明市</city>
<url>http://torchrelay.beijing2008.cn/cn/journey/hochiminhcity/</url>
</citymessage>
<citymessage>
<date>2008年4月30日</date>
<city>香港</city>
<url>http://torchrelay.beijing2008.cn/cn/journey/hongkong/</url>
</citymessage>
</root>