xml结构如下

复制代码 代码如下:

<ad>

<tupian>http://www.seehaha.com/images/060901-150.100.2.gif</tupian>

<tupian>http://www.seehaha.com/xml/061009-300.100.jpg</tupian>

<dizhi>http://www.seehaha.com/plan/</dizhi>

<dizhi>http://www.seehaha.com/va.htm</dizhi>

</ad>

==

// JScript 文件

var Now = new Date();

var Min = Now.getSeconds();

var i;

if((Min % 2) == 1)

//读取秒数，根据奇偶随机轮换，当然也可以改变此处算法增加xml节点数

{

i = 1;

}

else

{ i = 0; }

var url = "xml/ads.xml";

String.prototype.Trim = function() {

return this.replace(/(^s*)|(s*$)/g, "");

}

var xmlDoc;

//判断是否为Firefox或IE

var moz = (typeof document.implementation != 'undefined') && (typeof document.implementation.createDocument != 'undefined');

var ie = (typeof window.ActiveXObject != 'undefined');

function importXML(file) {

if (moz)

{

xmlDoc = document.implementation.createDocument("", "doc", null);

//创建FIREFOX下XML文档对象

}

else if (ie)

{ xmlDoc = new ActiveXObject("MSXML2.DOMDocument.3.0");

xmlDoc.async = false;

while( xmlDoc.readyState != 4) {};

//创建IE下XML文档对象

}

xmlDoc.load(file);

}importXML(url);//载入xml

function updatetupiandizhi()

{

if (moz)

{

var ad = xmlDoc.getElementsByTagName("ad")[0];

var tupian;

var _tupian = ad.getElementsByTagName("tupian")[i].firstChild.nodeValue;

if (_tupian) tupian = _tupian.Trim();

//得到tupian,dizhi节点下的值

var dizhi;

var _dizhi=ad.getElementsByTagName("dizhi")[i].firstChild.nodeValue;

if(_dizhi) dizhi = _dizhi.Trim();

document.getElementById('tupian').href = tupian;

document.getElementById('dizhi').src = dizhi;

//实现轮换

} else if (ie)

{var src = xmlDoc.documentElement.selectNodes("tupian");

var href = xmlDoc.documentElement.selectNodes("dizhi");

//得到tupian,dizhi节点下的值

document.getElementById("dizhi").href = href(i).text;

document.getElementById("tupian").src = src(i).text;

//实现轮换

}}