DEDECMS广告轮换代码（幻灯效果）

 <script LANGUAGE="javascript">
<!--
var cpAD=new Array(); 
var cpADlink=new Array(); 
var cpADmsg=new Array(); 
//定义了5个数组
var adNum=5; 
var coll=0;

//ad/1.html 那时你链接的广告地址

cpAD[0]="/banners/ad/1.gif"; 
cpADlink[0]="http://count.chanet.com.cn/click.cgi?a=294504&d=131883&u=&e="; 
cpADmsg[0]="1";

cpAD[1]="/banners/ad/2.gif"; 
cpADlink[1]="http://count.chanet.com.cn/click.cgi?a=294504&d=18290&u=&e="
cpADmsg[1]="2";

cpAD[2]="/banners/ad/3.gif"; 
cpADlink[2]="http://count.chanet.com.cn/click.cgi?a=294504&d=37894&u=&e="; 
cpADmsg[2]="3";

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="banners/1-2.gif";
                window.img2.src="banners/2.gif";
                window.img3.src="banners/3.gif";
                window.img4.src="banners/4.gif";
                window.img5.src="banners/5.gif";
                break;
        }
        case 1:
        {
                window.img1.src="banners/1.gif";
                window.img2.src="banners/2-2.gif";
                window.img3.src="banners/3.gif";
                window.img4.src="banners/4.gif";
                window.img5.src="banners/5.gif";
                break;
        }
        case 2:
        {
                window.img1.src="banners/1.gif";
                window.img2.src="banners/2.gif";
                window.img3.src="banners/3-2.gif";
                window.img4.src="banners/4.gif";
                window.img5.src="banners/5.gif";
                break;
        }
                case 3:
        {
                window.img1.src="banners/1.gif";
                window.img2.src="banners/2.gif";
                window.img3.src="banners/3.gif";
                window.img4.src="banners/4-2.gif";
                window.img5.src="banners/5.gif";
                break;
        }
                case 4:
        {
                window.img1.src="banners/1.gif";
                window.img2.src="banners/2.gif";
                window.img3.src="banners/3.gif";
                window.img4.src="banners/4.gif";
                window.img5.src="banners/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="banners/1-2.gif";
                window.img2.src="banners/2.gif";
                window.img3.src="banners/3.gif";
                window.img4.src="banners/4.gif";
                window.img5.src="banners/5.gif";
                break;
        }
        case 1:
        {
                window.img1.src="banners/1.gif";
                window.img2.src="banners/2-2.gif";
                window.img3.src="banners/3.gif";
                window.img4.src="banners/4.gif";
                window.img5.src="banners/5.gif";
                break;
        }
        case 2:
        {
                window.img1.src="banners/1.gif";
                window.img2.src="banners/2.gif";
                window.img3.src="banners/3-2.gif";
                window.img4.src="banners/4.gif";
                window.img5.src="banners/5.gif";
                break;
        }
        case 3:
        {
                window.img1.src="banners/1.gif";
                window.img2.src="banners/2.gif";
                window.img3.src="banners/3.gif";
                window.img4.src="banners/4-2.gif";
                window.img5.src="banners/5.gif";
                break;
        }
    case 4:
        {
                window.img1.src="banners/1.gif";
                window.img2.src="banners/2.gif";
                window.img3.src="banners/3.gif";
                window.img4.src="banners/4.gif";
                window.img5.src="banners/5-2.gif";
                break;
        }
}
}
if(adNum<cpAD.length-1)adNum++ ; 
else adNum=0; 
setTransition(); 
document.images.cpADrush.src=cpAD[adNum]; 
playTransition(); 
displayStatusMsg();
//定义了轮换时间 5s
theTimer=setTimeout("nextAd()", 5000); 
}