/**
 * 图片动画
 */

var imgUrl = new Array();
var imgLink = new Array();
var imgTitle = new Array();
var adNum = 0;
var oldAdNum = 0;

var _ad_id = -1;
function initImgArr(link, url, title) {
    _ad_id++;
    imgLink[_ad_id] = link;
    imgUrl[_ad_id] = url;
    imgTitle[_ad_id] = title;
}

function playTran(){
	if (document.all) document.getElementById("imgInit").filters.revealTrans.play();
}

function nextAd(){   
    if(adNum < imgUrl.length - 1) adNum++;
    else adNum = 0;
    
  $('ad_lab_'+adNum).className = 'select';
    if (oldAdNum>=0 && oldAdNum!=adNum){
        $('ad_lab_'+oldAdNum).className = 'unselect';
    }
	
    oldAdNum = adNum;
    
    if (imgUrl[adNum]) {
		if (document.all){
		    document.getElementById("imgInit").filters.revealTrans.Transition = 30;
		    document.getElementById("imgInit").filters.revealTrans.apply();
	        playTran();
		}
		document.getElementById("imgInit").src = imgUrl[adNum];
		document.images.imgInit.style.display = "";
		theTimer=setTimeout("nextAd()", 6000);
    } else {
        document.images.imgInit.style.display = "none";
        theTimer=setTimeout("nextAd()", 1);
    }
}

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

function gotoad(t){
    if (theTimer){
        clearTimeout(theTimer);
    }
    
    adNum = t-1;
    nextAd();
}

function $(s){return document.getElementById(s);}