// JavaScript Document

	var speed=20;
	var MyMar,MyMarDown;	
	var objUpTop=264;
	var objDownTop=212;
	var speedUp=1;
	var speedDown=1;
	var index=0;//总的索引
	var tt;
	var isDown=true;
	
	function initAd(){
		MM_preloadImages('images/button1p.jpg','images/button2p.jpg','images/button3p.jpg','images/button4p.jpg','images/button5p.jpg','images/button6p.jpg','images/button7p.jpg','images/button8p.jpg');
		$("adBigPic").src=linkBigPic[0];//初化大图片
		$("ad-title-text").innerHTML=linkText[index];
		for(var i=0;i<linkSmallPic.length;i++){//初始化左侧列表信息
			$("ad-list"+i).innerHTML=linkSmallPic[i];
		}
		$("ad-list0").onclick='';
		changePic();
	}
	
	function changePic(){
		objUpTop=264;//从新初始化
		objDownTop=212;
		speedUp=1;//从新初始化
		speedDown=1;
		isDown=true;
		for(var i=0;i<linkSmallPic.length;i++){//初始化左侧列表信息
			$("ad-list"+i).className="ad-list-unselect";
			$("ad-list"+i).onmouseover="adlistmouseover";
			$("ad-list"+i).onmouseout="adlistmouseout";
			eval("$('ad-list'+"+i+").onmouseover=function(){change_pic("+i+");}");
		}		
		$("ad-list"+index).className="ad-list-select";
		$("ad-list"+index).onclick="";
		$("ad-list"+index).onmouseover="";
		$("ad-list"+index).onmouseout="";
		$("adBigPic").src=linkBigPic[index];
		$("ad-link-url").href=linkURL[index];
		
		document.getElementById("adBigPic").filters[0].Apply();//应用此效果后,在FF中弹出标题效果失效
		document.getElementById("adBigPic").filters[0].Play(duration=1);
		
		MyMar=setInterval(MarqueeUp,speed);
		
		//tt=setTimeout('changePic()',4000);
	}
	
	function change_pic(n){
		index=n;
		//window.clearInterval(tt);
		changePic();}
	
	function MarqueeUp(){
		if (isDown){//往下滚
			if(objDownTop>=264){//判断是否滚动完成
				$("ad-title-text").style.top="264px";
				$("ad-title").style.top="264px";
				isDown=false;
				//滚到底后再更新文字,以免在还没有完全隐藏前更新文字
				$("ad-title-text").innerHTML=linkText[index];
				index++;
				if (index>=linkSmallPic.length) {index=0;}
			}
			else
			{
				objDownTop=objDownTop+speedDown;
				speedDown=speedDown+2;
				if(objDownTop>=264)
					objDownTop=264;
				$("ad-title").style.top=objDownTop+"px";
				$("ad-title-text").style.top=objDownTop+"px";
			}
		}
		else{//往上滚
			if(objUpTop<=212){//判断是否滚动完成
				$("ad-title-text").style.top="212px";
				$("ad-title").style.top="212px";
				clearInterval(MyMar);
			}
			else
			{
				objUpTop=objUpTop-speedUp/2;
				speedUp++;
				if(objUpTop<=212)
					objUpTop=212;
				$("ad-title").style.top=objUpTop+"px";
				$("ad-title-text").style.top=objUpTop+"px";
			}
		}
	}
		
//	function $(obj){
//		return document.getElementById(obj);
//	}