var theTimer;
var cpAD=new Array(); 
var cpADlink=new Array(); 
var maxAd=5;			// 
var adNum=5;     //定义了5个数组
var coll=0;

cpAD[0]="images/top_ad/1.jpg";          //链接图片
cpADlink[0]="http://www.shsunedu.com/huodong/huanxun.htm";         //链接URL

cpAD[1]="images/top_ad/2.jpg"; 
cpADlink[1]="http://www.suneln.com/Information.asp?g_sx=建工学卡"

cpAD[2]="images/top_ad/3.jpg"; 
cpADlink[2]="http://www.suneln.com/Information.asp?g_sx=建工学卡"; 

cpAD[3]="images/top_ad/4.jpg"; 
cpADlink[3]="http://www.suneln.com/Information.asp?g_sx=选课中心"; 

cpAD[4]="images/top_ad/5.jpg"; 
cpADlink[4]="http://www.suneln.com/new_more.asp?编号=76661"; 

var preloadedimages=new Array(); 
for (i=1;i<maxAd;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)
{
    var i=null;
    var m=null;
    var o=null;
    
    adNum=n;
    
    for(i=1;i<=maxAd;i++)
    {
    	m="img"+i;
    	o=document.getElementById(m);
    	if (i==n)
	    	o.src="images/s_h_"+i+".gif";
	    else
	    	o.src="images/s_n_"+i+".gif";
    }
    window.clearInterval(theTimer);
    adNum=adNum-1;
    nextAd();
}
//当点击时直接跳转
function nextAd(){ 
	var m=null;
	var i=null;
	var o=null;
	var f=null;
	var c=null;
	var k=null;		
coll++;
if(coll>1)
{
	c=adNum+1;
	if (c==maxAd)
		k=1;
	else
		k=c+1;
	for(i=1;i<=maxAd;i++)
	{
		o=document.getElementById("img"+i);
		if (i==k)
			f="images/s_h_"+i+".gif";
		else
			f="images/s_n_"+i+".gif";
		o.src=f;
	}
}
if(adNum<maxAd-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); 
} 

function setTransition(){ 
if (document.all){ 
document.images.cpADrush.filters.revealTrans.Transition=23; 
document.images.cpADrush.filters.revealTrans.apply(); 
} 

} 
function playTransition(){ 
if (document.all) 
document.images.cpADrush.filters.revealTrans.play() 
} 
function displayStatusMsg() { 
document.returnValue = true; 
} 
//结束
// -->