图片轮显的代码

<script LANGUAGE="javascript">
<!--
var cpAD=new Array();
var cpADlink=new Array();
var cpADmsg=new Array();
var adNum=5; //定义了5个数组
var coll=0;
cpAD[0]="http://www.5dm.cn/upload/1498/banners/mba.gif"; //链接图片
cpADlink[0]="http://www.5dm.cn/"; //链接URL
cpADmsg[0]="mba.gif"; //状态栏提示信息
cpAD[1]="http://www.5dm.cn/upload/1498/banners/google.gif";
cpADlink[1]="http://www.5dm.cn/"
cpADmsg[1]="google.gif";
cpAD[2]="http://www.5dm.cn/upload/1498/banners/2005.gif";
cpADlink[2]="http://www.5dm.cn/";
cpADmsg[2]="2005.gif";
cpAD[3]="http://www.5dm.cn/upload/1498/banners/cz8y.gif";
cpADlink[3]="http://www.5dm.cn/";
cpADmsg[3]="cz8y.gif";
cpAD[4]="http://www.5dm.cn/upload/1498/banners/JG_YUEDU.gif";
cpADlink[4]="http://www.5dm.cn/";
cpADmsg[4]="JG_YUEDU.gif";
var preloadedimages=new Array();
for (i=1;i<cpAD.length;i++){
preloadedimages[i]=new Image();
preloadedimages[i].src=cpAD[i];
}
//跳转的URL地址
function jump2url()
{
jumpUrl=cpADlink[adNum];
jumpTarget=‘_blank‘;
if (jumpUrl != ‘‘)
{
if (jumpTarget != ‘‘)
window.open(jumpUrl,jumpTarget);
else location.href=jumpUrl;
}
}
//图片变化的函数
function changeimg(n)
{
adNum=n;
switch(adNum)
{
case 0:
{
window.img1.src="http://www.5dm.cn/upload/1498/images/1-2.gif";
window.img2.src="http://www.5dm.cn/upload/1498/images/2.gif";
window.img3.src="http://www.5dm.cn/upload/1498/images/3.gif";
window.img4.src="http://www.5dm.cn/upload/1498/images/4.gif";
window.img5.src="http://www.5dm.cn/upload/1498/images/5.gif";
break;
}
case 1:
{
window.img1.src="http://www.5dm.cn/upload/1498/images/1.gif";
window.img2.src="http://www.5dm.cn/upload/1498/images/2-2.gif";
window.img3.src="http://www.5dm.cn/upload/1498/images/3.gif";
window.img4.src="http://www.5dm.cn/upload/1498/images/4.gif";
window.img5.src="http://www.5dm.cn/upload/1498/images/5.gif";
break;
}
case 2:
{
window.img1.src="http://www.5dm.cn/upload/1498/images/1.gif";
window.img2.src="http://www.5dm.cn/upload/1498/images/2.gif";
window.img3.src="http://www.5dm.cn/upload/1498/images/3-2.gif";
window.img4.src="http://www.5dm.cn/upload/1498/images/4.gif";
window.img5.src="http://www.5dm.cn/upload/1498/images/5.gif";
break;
}
case 3:
{
window.img1.src="http://www.5dm.cn/upload/1498/images/1.gif";
window.img2.src="http://www.5dm.cn/upload/1498/images/2.gif";
window.img3.src="http://www.5dm.cn/upload/1498/images/3.gif";
window.img4.src="http://www.5dm.cn/upload/1498/images/4-2.gif";
window.img5.src="http://www.5dm.cn/upload/1498/images/5.gif";
break;
}
case 4:
{
window.img1.src="http://www.5dm.cn/upload/1498/images/1.gif";
window.img2.src="http://www.5dm.cn/upload/1498/images/2.gif";
window.img3.src="http://www.5dm.cn/upload/1498/images/3.gif";
window.img4.src="http://www.5dm.cn/upload/1498/images/4.gif";
window.img5.src="http://www.5dm.cn/upload/1498/images/5-2.gif";
break;
}
}
window.clearInterval(theTimer);
adNum=adNum-1;
nextAd();
}
//当点击时直接跳转
function nextAd(){
coll++;
if(coll>1)
{
switch(adNum+1)
{
case 5:
{
window.img1.src="http://www.5dm.cn/upload/1498/images/1-2.gif";
window.img2.src="http://www.5dm.cn/upload/1498/images/2.gif";
window.img3.src="http://www.5dm.cn/upload/1498/images/3.gif";
window.img4.src="http://www.5dm.cn/upload/1498/images/4.gif";
window.img5.src="http://www.5dm.cn/upload/1498/images/5.gif";
break;
}
case 1:
{
window.img1.src="http://www.5dm.cn/upload/1498/images/1.gif";
window.img2.src="http://www.5dm.cn/upload/1498/images/2-2.gif";
window.img3.src="http://www.5dm.cn/upload/1498/images/3.gif";
window.img4.src="http://www.5dm.cn/upload/1498/images/4.gif";
window.img5.src="http://www.5dm.cn/upload/1498/images/5.gif";
break;
}
case 2:
{
window.img1.src="http://www.5dm.cn/upload/1498/images/1.gif";
window.img2.src="http://www.5dm.cn/upload/1498/images/2.gif";
window.img3.src="http://www.5dm.cn/upload/1498/images/3-2.gif";
window.img4.src="