//把这段放到jsp里面，实现动态读取最新的图片
/*
var preloadedimages = new Array() ; 

var cpAD=new Array();
var cpADlink=new Array();
var cpADmsg=new Array();
var adNum=6; 
var coll=0;

cpAD[0]="http://zi.csdn.net/no1.280-187.gif";
cpADlink[0]="http://z.csdn.net/adclick.php?bannerid=395";
cpADmsg[0]="1"; 

cpAD[1]="http://zi.csdn.net/no2-280_187.gif";
cpADlink[1]="http://z.csdn.net/adclick.php?bannerid=459";
cpADmsg[1]="2";

cpAD[2]="http://zi.csdn.net/no3.gif";
cpADlink[2]="http://z.csdn.net/adclick.php?bannerid=401";
cpADmsg[2]="3"; 

cpAD[3]=" http://zi.csdn.net/no4.jpg";
cpADlink[3]="http://z.csdn.net/adclick.php?bannerid=410";
cpADmsg[3]="4";


cpAD[4]="http://zi.csdn.net/no5.jpg";
cpADlink[4]="http://z.csdn.net/adclick.php?bannerid=369";
cpADmsg[4]="5"; 

cpAD[5]="http://zi.csdn.net/no.6.280.187.gif";
cpADlink[5]="http://z.csdn.net/adclick.php?bannerid=372";
cpADmsg[5]="6"; 
*/

for( i=1 ; i<cpAD.length ; i++ )
{ 
	//alert( cpAD.length + " -----(1-5) " + 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:
		{
			//alert( "changeimg case 0 --- n=" + n +" --- " + "adNum = n-1 = " + adNum ) ;  
			document.all.img1.src="/images/a1-2.gif";
			document.all.img2.src="/images/a2.gif";
			document.all.img3.src="/images/a3.gif";
			document.all.img4.src="/images/a4.gif";
			//document.all.img5.src="/images/a5.gif";
			//document.all.img6.src="/images/a6.gif";
			break;
		}
		case 1:
		{
			document.all.img1.src="/images/a1.gif";
			document.all.img2.src="/images/a2-2.gif";
			document.all.img3.src="/images/a3.gif";
			document.all.img4.src="/images/a4.gif";
			//document.all.img5.src="/images/a5.gif";
			//document.all.img6.src="/images/a6.gif";
			break;
		}
		case 2:
		{
			document.all.img1.src="/images/a1.gif";
			document.all.img2.src="/images/a2.gif";
			document.all.img3.src="/images/a3-2.gif";
			document.all.img4.src="/images/a4.gif";
			//document.all.img5.src="/images/a5.gif";
			//document.all.img6.src="/images/a6.gif";
			break;
		}
		case 3:
		{
			document.all.img1.src="/images/a1.gif";
			document.all.img2.src="/images/a2.gif";
			document.all.img3.src="/images/a3.gif";
			document.all.img4.src="/images/a4-2.gif";
			//document.all.img5.src="/images/a5.gif";
			//document.all.img6.src="/images/a6.gif";
			break;
		}
		case 4:
		{
			//alert( "changeimg case 4 --- n=" + n +" --- " + "adNum = n-1 = " + adNum ) ;  
			document.all.img1.src="/images/a1.gif";
			document.all.img2.src="/images/a2.gif";
			document.all.img3.src="/images/a3.gif";
			document.all.img4.src="/images/a4.gif";
			//document.all.img5.src="/images/a5-2.gif";
			//document.all.img6.src="/images/a6.gif";
			break;
		}
		case 5:
		{
			document.all.img1.src="/images/a1.gif";
			document.all.img2.src="/images/a2.gif";
			document.all.img3.src="/images/a3.gif";
			document.all.img4.src="/images/a4.gif";
			//document.all.img5.src="/images/a5.gif";
			//document.all.img6.src="/images/a6-2.gif";
			break;
		}
	}

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


function nextAd()
{
	//adNum = 6 --- coll= 0
	//alert( "nextAd" + " --- " + "adNum = " + adNum + " --- " + "coll = " + coll ) ; 
	coll++;
	if( coll > 1 )
	{
		switch( adNum+1 )
		{
			case 0:
			{
				//alert( "nextAd --- switch( adNum+1 ) = " + adNum+1 + " --- " + "case 0 " + " --- " + "coll = " + coll + " --- " + "adNum=" + adNum ) ;  
				document.all.img1.src="/images/a1-2.gif";
				document.all.img2.src="/images/a2.gif";
				document.all.img3.src="/images/a3.gif";
				document.all.img4.src="/images/a4.gif";
				//document.all.img5.src="/images/a5.gif";
				//document.all.img6.src="/images/a6.gif";

				break;
			}
			case 1:
			{
				//adNum = 0 
				//alert( "nextAd --- switch( adNum+1 ) = " + adNum+1 + " --- " + "case 1 " + " --- " + "coll = " + coll + " --- " + "adNum=" + adNum ) ;  

				document.all.img1.src="/images/a1.gif";
				document.all.img2.src="/images/a2-2.gif";
				document.all.img3.src="/images/a3.gif";
				document.all.img4.src="/images/a4.gif";
				//document.all.img5.src="/images/a5.gif";
				//document.all.img6.src="/images/a6.gif";
				break;
			}
			case 2:
			{
				//adNum = 1
				document.all.img1.src="/images/a1.gif";
				document.all.img2.src="/images/a2.gif";
				document.all.img3.src="/images/a3-2.gif";
				document.all.img4.src="/images/a4.gif";
				//document.all.img5.src="/images/a5.gif";
				//document.all.img6.src="/images/a6.gif";
				break;
			}
			case 3:
			{
				//adNum = 2
				document.all.img1.src="/images/a1.gif";
				document.all.img2.src="/images/a2.gif";
				document.all.img3.src="/images/a3.gif";
				document.all.img4.src="/images/a4-2.gif";
				//document.all.img5.src="/images/a5.gif";
				//document.all.img6.src="/images/a6.gif";
				break;
			}
			case 4:
			{
				//adNum = 3
				document.all.img1.src="/images/a1.gif";
				document.all.img2.src="/images/a2.gif";
				document.all.img3.src="/images/a3.gif";
				document.all.img4.src="/images/a4.gif";
				//document.all.img5.src="/images/a5-2.gif";
				//document.all.img6.src="/images/a6.gif";
				break;
			}
			case 5:
			{
				//adNum = 4
				document.all.img1.src="/images/a1.gif";
				document.all.img2.src="/images/a2.gif";
				document.all.img3.src="/images/a3.gif";
				document.all.img4.src="/images/a4.gif";
				//document.all.img5.src="/images/a5.gif";
				//document.all.img6.src="/images/a6-2.gif";
				break;
			}
			case 6:
			{
				//adNum = 5
				document.all.img1.src="/images/a1-2.gif";
				document.all.img2.src="/images/a2.gif";
				document.all.img3.src="/images/a3.gif";
				document.all.img4.src="/images/a4.gif";
				//document.all.img5.src="/images/a5.gif";
				//document.all.img6.src="/images/a6.gif";
				break;
			}
			case 7:
			{
				//alert( "nextAd case 6 : " + adNum ) ;
				//adNum = 6 , 调试大半天，原来是这里还要再加一个，否则到了最后一个回头显示第一个会一闪而过
				document.all.img1.src="/images/a1-2.gif";
				document.all.img2.src="/images/a2.gif";
				document.all.img3.src="/images/a3.gif";
				document.all.img4.src="/images/a4.gif";
				//document.all.img5.src="/images/a5.gif";
				//document.all.img6.src="/images/a6.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() ;
	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() 
{ 
	statusStr = cpADmsg[adNum] ; 
	var ob=document.getElementById("cpADmsgDiv");
	//alert(document.getElementById("cpADmsgDiv"));
	ob.innerHTML=statusStr;
	document.returnValue = true; 
}