项目需要，无耐做了个通用的。当然无法与CSDN的那个比美。但我这个是通用的。不用写两句JS代码就可以实显广告轮显。

//------------------------------------------------------------

//CopyRight(C)CAnca Software Office.

//Created by CAnca Torvals.

//2007.11.5.

//版权所有，拿来用不究，删版权信息，请自究。

//----------------------------------------------------------

//将以下的JS代码保存到一个文件。

//文件:ad.js

//-------------------------------------------------------

var currentpointer = -1;

var url = "picnews.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);

} else {

  if (ie) {

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

   xmlDoc.async = false;

   while (xmlDoc.readyState != 4) {

   }

  }

}

xmlDoc.load(file);

}

importXML(url);

//下一幅

function next(){

var max = getMax();

if(++currentpointer > max - 1){

  currentpointer = 0;

}

updateImageNews();

}

//上一幅

function prev(){

if(--currentpointer < 0){

  currentpointer = 0;

}

updateImageNews();

}

­

//更新图片新闻区域.

function updateImageNews(){

if (moz) {

  var news = xmlDoc.getElementsByTagName("imgnews")[currentpointer];

  //------------获取新闻数据---------------------

  var url = news.getElementsByTagName("url")[0].firstChild.nodeValue;

  var target = news.getElementsByTagName("target")[0].firstChild.nodeValue;

  var img = news.getElementsByTagName("img")[0].firstChild.nodeValue;

  var title = news.getElementsByTagName("title")[0].firstChild.nodeValue;

  

  setImageSize(img);

  

  /*赋值*/

  imgobj["src"] = img.Trim();

  urlobj.setAttribute("href",url.Trim());

  urlobj.setAttribute('target',target.Trim());

  urlobj["firstChild"]["nodeValue"] = title.Trim();

}else{

  if(ie){

   var news = xmlDoc.documentElement.selectNodes("imgnews")[currentpointer];

   //------------获取新闻数据---------------------

   var url = news.selectNodes("url")[0].text;

   var target = news.selectNodes("target")[0].text;

   var img = news.selectNodes("img")[0].text;

   var title = news.selectNodes("title")[0].text;

   setImageSize(img);

  

   imgobj.filters.revealtrans.transition =  parseInt(Math.random() * 25);

   imgobj.filters.revealtrans.apply();

   imgobj.filters.revealtrans.play();

  

   /* 赋值*/

   imgobj["src"] = img.Trim();

   urlobj["href"] = url.Trim();

   urlobj["attributes"]["target"]["value"] = target.Trim();

   urlobj["firstChild"]["nodeValue"] = title.Trim();

  }

}

}

//设置图片大小

function setImageSize(imgsrc){

//建造图片对象--缩放图象

var imageobj = new Image();

//加载图片,获得图片大小并设置.

loadingImage(imageobj);

imageobj["src"] = imgsrc.Trim();

}

//加载监听

var loadtimeout;

var loadingImageBag;

function loadingImage(_imgobj){

loadingImageBag = function(){

  loadingImage(_imgobj);

}

if(null == _imgobj){

  return;

}

var width = _imgobj["width"];

var height = _imgobj["height"];

if(width > 0 && height > 0){

  var _image = new myImage(width,height);

  loadtimeout = null;

  fixImageSize(_image);

  _imgobj = null;

  return;

}

loadtimeout = window.setTimeout("loadingImageBag()",200,"javascript");

}

//显示指定新闻图片

function getAppointNews(newsNum){

window.clearTimeout(timeouts);

currentpointer = newsNum;

updateImageNews();

timeouts = window.setTimeout("showbegin()",lazytime,"javascript");

}

­

//默认导航条生成方法

function navigation(newsNumbers,methodName){

var blank = " ";

var content = "";

for(var i = 0 ; i < newsNumbers ; i++){

  var ahref = "<a href=&#92;"javascript:void(0);&#92;" onclick=&#92;"";

  var url = ahref + methodName;

  url += "(";

  url += i;

  url += ");&#92;">";

  url += (i + 1);

  url += "</a>";

  

  url += blank;

  content += url;

  

}

return content;

}

//初始化----------------------------------------------------------------------------

var imgobj,urlobj,fixWidth,fixHeight;

//导航条生成方法

var navigationMethod = navigation;

var navigationContext;

var lazytime = 5 * 1000;

function init(_navigationMethod,_navigationContext,imgname,url,times){

if(null != _navigationMethod && typeof _navigationMethod == "function"){

  navigationMethod = _navigationMethod;

}

if(null != _navigationContext && "" != _navigationContext){

  navigationContext = document.getElementById(_navigationContext)

}

//生成导航.

makeNavigation();

imgobj = document.getElementById(imgname);

urlobj = document.getElementById(url);

fixWidth = imgobj["width"];

fixHeight = imgobj["height"];

if(times != null && typeof times != 'undefined' ){

  lazytime = times * 1000;

}

showbegin();

}

//制造Navigation工厂.

function makeNavigation(){

if(typeof navigationContext == "undefined" || navigationContext == null){

  return ;

}

var max = getMax();

var content = navigationMethod(max,'getAppointNews');

navigationContext.innerHTML = content;

}

//-------------------------------------------------------------------------------------

function fixImageSize(myImageObject){

var picWidth = myImageObject["width"] * 1.0;

var picHeight = myImageObject["height"] * 1.0;

var fixh = fixHeight;

var fixw = fixWidth;

// 按比例计算出缩略图的宽度和高度

if (picWidth >= picHeight) {

  fixh = parseFloat(Math.floor((picHeight * fixWidth) / picWidth));

} else {

  fixw = parseFloat(Math.floor(picWidth * fixHeight / picHeight));

}

­

imgobj["width"] = fixw;

imgobj["height"] = fixh;

}

var timeouts;

function showbegin(){

next();

timeouts = window.setTimeout("showbegin()",lazytime,"javascript");

}

//获取最大值.即新闻个数

function getMax(){

var imgnews;

if(moz){

  imgnews = xmlDoc.getElementsByTagName("imgnews");

}else{

  if(ie){

   imgnews = xmlDoc.documentElement.selectNodes("imgnews");

  }

}

return imgnews.length;

}

//点击图片打开连接

function view(){

var href = urlobj["href"];

if(!urlobj){

  alert("连接对象不能加载!缺少对象.");

  return;

}

­

//如果是JAVAScript.就直接执行.

if(href.indexOf("javascript:") != -1){

  eval(href);

  return;

}

//否则打开窗口

var _target;

if(moz){

  _target = urlobj.getAttribute('target');

}else{

  if(ie){

   _target = urlobj["attributes"]["target"]["value"];

  }

}

­

if(null == _target || "_self" == _target || "" == _target){

  window.location.href = href;

}else{

  window.open(href,_target);

}

}

//image 对象

function myImage(width,height){

this.width = width;

this.height = height;

}

//-------------JS这里结束-------------------------

­

调用方法:

<html>

<!-- 参数说明

      init(_navigationMethod,_navigationContext,imgname,url,times)

      _navigationMethod :导航函数，可以自定义。null 或"" 即表示使用默认方法生成。

      _navigationContext :导航函数存放器ID。如果为NULL或为""即表示不使用导航。

      imgname:图片存放器ID。（必须）

      url:超链接ID。（必须）

      times:多少秒显示下一幅。默认5秒.

-->

<body >

        <a href="" id="urlnews" target="">新闻标题</a></td>

<img src="picnewsbg.gif" id="picnews" class="powerpoint"  width="210" height="200"/>

div align="right" id="newsnav"></div>

</body>

.....

<html>

 

//广告信息

//picnews.xml

//---------------------------

<?xml version='1.0' encoding='gb2312'?>
<imagenews>
 <imgnews>
  <url>http://www.beareyes.com.cn/2/lib/200710/29/536/DSC_0097.jpg</url>
  <target>_blank</target>
  <img>http://www.beareyes.com.cn/2/lib/200710/29/536/DSC_0097.jpg</img>
  <title>广东</title>
 </imgnews>
 <imgnews>
  <url>http://bbs.lupaworld.com/1123517557/Fid_65/65_2646.jpg</url>
  <target>_self</target>
  <img>http://bbs.lupaworld.com/1123517557/Fid_65/65_2646.jpg</img>
  <title>上海</title>
 </imgnews>
 <imgnews>
  <url>http://www.baidu.com</url>
  <target>_self</target>
  <img>http://botu.bokee.com/photodata/2006-7-19/001/502/687/2382111/2382111.jpg</img>
  <title>东莞</title>
 </imgnews>
</imagenews>