var preloadedimages = new Array() ; 
var cpAD=new Array();

//图片数目
var adNum=4; 


//图片地址和链接
cpAD[0]="images/banner03.gif";
cpAD[1]="images/banner02.gif";
cpAD[2]="images/banner01.gif";
cpAD[3]=" images/banner04.gif";

for( i=1 ; i<cpAD.length ; i++ )
{ 
	//alert( cpAD.length + " -----(1-5) " + i ) ;
	preloadedimages[i] = new Image() ; 
	preloadedimages[i].src = cpAD[i] ; 
} 


function nextAd()
{
	//adNum = 6 --- coll= 0
	//alert( "cpAD.length" + cpAD.length + "adNum = " + adNum ) ; 

	if(adNum<cpAD.length-1)
	{
		document.images.cpADrush.src=cpAD[adNum]; 
		adNum++ ; 
	}
	else 
	{
		adNum=0;
		document.images.cpADrush.src=cpAD[adNum]; 
		adNum=1;
	}

	setTransition() ;
	document.images.cpADrush.src=cpAD[adNum] ; 
	playTransition() ; 
	theTimer = setTimeout("nextAd()", 3500) ; 
}


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() 
} 


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