var preloadedimages = new Array() ; 
var theTimer2;
var cpAD=new Array();
var cpADlink=new Array();
var cpADmsg=new Array();
//序数图片路径
var iconPath="js/num/";
//图片数目
var adNum=5; 
var coll=0;
//图片地址和链接
cpAD[0]="image/js_ad/1.jpg";
cpADlink[0]="http://www.yypanda.net/";
cpADmsg[0]="1"; 

cpAD[1]="image/js_ad/2.jpg";
cpADlink[1]="http://www.greataction.com.cn/movie/index.php";
cpADmsg[1]="2";

cpAD[2]="image/js_ad/3.jpg";
cpADlink[2]="http://www.art3d.com.cn/";
cpADmsg[2]="3"; 


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

function jump2url()
{ 
	jumpUrl = cpADlink[adNum] ; 
	jumpTarget = '_blank' ; 
	if( jumpUrl != '' )
	{ 
		if(	jumpTarget != '' ){window.open(jumpUrl,jumpTarget) ; }
		else {location.href = jumpUrl ; }
	} 
}


function changeimg( n )
{
	adNum = n-1 ;
	switch(n)
	{
		case 0:
		{
			document.all.img1.src=iconPath+"1-2.gif";
			document.all.img2.src=iconPath+"2.gif";
			document.all.img3.src=iconPath+"3.gif";
			break;
		}
		case 1:
		{
			document.all.img1.src=iconPath+"1.gif";
			document.all.img2.src=iconPath+"2-2.gif";
			document.all.img3.src=iconPath+"3.gif";
			break;
		}
		case 2:
		{
			document.all.img1.src=iconPath+"1.gif";
			document.all.img2.src=iconPath+"2.gif";
			document.all.img3.src=iconPath+"3-2.gif";
			break;
		}
		case 3:
		{
			document.all.img1.src=iconPath+"1.gif";
			document.all.img2.src=iconPath+"2.gif";
			document.all.img3.src=iconPath+"3.gif";
			break;
		}
		case 4:
		{
			document.all.img1.src=iconPath+"1.gif";
			document.all.img2.src=iconPath+"2.gif";
			document.all.img3.src=iconPath+"3.gif";
			break;
		}
	}

	window.clearInterval( theTimer2 ) ;
	nextAd();
}


function nextAd()
{
	coll++;
	if( coll > 1 )
	{
		switch( adNum+1 )
		{
			case 0:
			{
				document.all.img1.src=iconPath+"1-2.gif";
				document.all.img2.src=iconPath+"2.gif";
				document.all.img3.src=iconPath+"3.gif";
				break;
			}
			case 1:
			{
				document.all.img1.src=iconPath+"1.gif";
				document.all.img2.src=iconPath+"2-2.gif";
				document.all.img3.src=iconPath+"3.gif";
				break;
			}
			case 2:
			{
				document.all.img1.src=iconPath+"1.gif";
				document.all.img2.src=iconPath+"2.gif";
				document.all.img3.src=iconPath+"3-2.gif";
				break;
			}
			case 3:
			{
				document.all.img1.src=iconPath+"1.gif";
				document.all.img2.src=iconPath+"2.gif";
				document.all.img3.src=iconPath+"3.gif";
				break;
			}
			case 4:
			{
				//adNum = 3
				document.all.img1.src=iconPath+"1.gif";
				document.all.img2.src=iconPath+"2.gif";
				document.all.img3.src=iconPath+"3.gif";
				break;
			}
			case 5:
			{
				//adNum = 4
				document.all.img1.src=iconPath+"1-2.gif";
				document.all.img2.src=iconPath+"2.gif";
				document.all.img3.src=iconPath+"3.gif";
				break;
			}
			case 6:
			{
				//adNum = 5
				document.all.img1.src=iconPath+"1-2.gif";
				document.all.img2.src=iconPath+"2.gif";
				document.all.img3.src=iconPath+"3.gif";
				break;
			}
			case 7:
			{
				//alert( "nextAd case 6 : " + adNum ) ;
				//adNum = 6 
				document.all.img1.src=iconPath+"1-2.gif";
				document.all.img2.src=iconPath+"2.gif";
				document.all.img3.src=iconPath+"3.gif";
				adNum=0;
				break;
			}
		}
	}

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

	setTransition() ;
	document.images.cpADrush.src=cpAD[adNum] ; 
	playTransition() ; 
	displayStatusMsg() ;
	theTimer2 = 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() 
{ 
	defaultStatus = cpADmsg[adNum] ; 
	document.returnValue = true; 
}