var cpAD=new Array(); 
var cpADlink=new Array(); 
var cpADmsg=new Array(); 
var adNum=4; 
var coll=0;

cpAD[0]="picnews/1.jpg"; 
cpADlink[0]="";
cpADmsg[0]="苏丹3/7区电站"; 

cpAD[1]="picnews/2.jpg"; 
cpADlink[1]=" "; 
cpADmsg[1]="巴基斯坦管线"; 

cpAD[2]="picnews/3.jpg"; 
cpADlink[2]=""; 
cpADmsg[2]="苏丹1/2/4区集油站";

cpAD[3]="picnews/4.jpg"; 
cpADlink[3]=""; 
cpADmsg[3]="苏丹炼油厂的大全景"; 

 


var preloadedimages=new Array(); 

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;
	window.clearInterval(theTimer);
	adNum=adNum-1;
	nextAd();
}

function nextAd()
{ 
	coll++;
	if(adNum<cpAD.length-1)adNum++ ; 
	else adNum=0; 
	
	for (i=0;i<4;i++){ 
		cur_tab = document.getElementById("tab"+i);
		cur_tab.style.backgroundColor='';
	} 
	cur_tab = document.getElementById("tab"+adNum);
	cur_tab.style.backgroundColor='#cccccc';
	setTransition(); 
	
	document.images.cpADrush.src=cpAD[adNum]; 
	imgtext.innerHTML=cpADmsg[adNum];

	playTransition(); 
	//displayStatusMsg();
	theTimer=setTimeout("nextAd()", 7000); 
} 

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; 
}