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]="images/banner-1.gif";
cpADlink[0]="";
cpADmsg[0]="";

cpAD[1]="images/banner-2.gif";
cpADlink[1]="";
cpADmsg[1]="";

cpAD[2]="images/banner-3.gif";
cpADlink[2]="";
cpADmsg[2]="";

cpAD[3]="images/banner-4.jpg"; 
cpADlink[3]=""
cpADmsg[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; 
    } 
}
//当点击时直接跳转
function nextAd(){ 
coll++;
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); 
} 

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

} 
function playTransition(){ 
if (document.all) 
cpADrush.filters.revealTrans.play() 
} 
function displayStatusMsg() { 
status=cpADmsg[adNum]; 
document.returnValue = true; 
}