var imgUrl=new Array();
var imgLink=new Array();
var imgID = new Array();
var is_ie=document.all?true:false;
var adNum=0;
var str;
var j=0;
var currentImg = null; //当前所在的序列号
function playTran(){
		imgInit.filters.revealTrans.play();
}

//var key=0;
function nextAd_ie(){
	if(adNum<j)adNum++ ;
	else adNum=1;
	scroll_image(adNum-1);
	imgInit.filters.revealTrans.Transition=23;
	imgInit.filters.revealTrans.apply();
	playTran();
	document.images.imgInit.src=imgUrl[adNum-1].src;
	theTimer=setTimeout("nextAd_ie()", 3000);
}

function cTrim(obj){
	str=obj;
	if(obj.length>10){
		str=str.substring(0,10)+"...";
	}
	return str;
}
function goUrl(){
	jumpUrl=imgLink[adNum-1];
	jumpTarget='_blank';
	PKUtil.addBannerClickingLog(imgID[adNum-1],'home_scroll');
	//add_banner_clicking_log(imgID[adNum-1],'home_scroll');
	if (jumpUrl != ''){
		if (jumpTarget != '') 
			window.open(jumpUrl,jumpTarget);
		else
			location.href=jumpUrl;
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = $(id).style; 
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	$(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}
function nextAd_fox(){
	if(adNum<j)adNum++ ;
	else adNum=1;
	scroll_image(adNum-1);
	var str=imgUrl[adNum-1].src;
	blendimage("divImg","imgInit",str,300);
	theTimer=setTimeout("nextAd_fox()", 3000);
}
function inif(){
	if(is_ie){
		$("imgInit").style.filter='revealTrans';
		$("imgInit").style.duration=2;
		$("imgInit").style.transition=21;	
	}else{
		$("imgInit").style.filter='alpha(opacity=0)';
		$("imgInit").style.MozOpacity='0';		
		$("imgInit").style.opacity=0;		
	}
}
function nextAd(){
	inif();
	if(is_ie){
		nextAd_ie();
	}else{
		nextAd_fox();
	}
	
}
function writeAdNav(){
	var htmlstr=""
	if(j > 0 ){
		for(var ind = 0; ind < j; ind++){
			htmlstr += "<img id=\"n_img_"+ind+"\" src=\"/images/home/n"+(ind+1)+""+(ind+1)+".gif\"  onclick=\"change_img("+ind+")\" />";
		}
		$("nav_img").innerHTML = htmlstr;
	}
	$("nav_img").show();
}
function change_img(ind){
	clearTimeout(theTimer);
	$("ad_to_link").href = imgLink[ind];
	$("ad_to_link").target = "_blank";
	if(is_ie){
		imgInit.filters.revealTrans.Transition=23;
		imgInit.filters.revealTrans.apply();
		playTran();
		$("imgInit").src = imgUrl[ind].src;
		theTimer=setTimeout("nextAd_ie()", 3000);
	}else{
		var str=imgUrl[ind].src;
		blendimage("divImg","imgInit",str,300);	
		theTimer=setTimeout("nextAd_fox()", 3000);	
	}
	scroll_image(ind);
}
//滚动序列号
function scroll_image(serial_no){
	for(var ind = 0; ind < j; ind++){
		$("n_img_"+ind).src = "/images/home/n"+(ind+1)+""+(ind+1)+".gif";
	}
	$("n_img_"+serial_no).src = "/images/home/n"+(serial_no+1)+".gif";
}