var imgWidth=980;              //图片宽
   var imgHeight=308;             //图片高
   var TimeOut=5000;              //每张图切换时间 (单位毫秒);
   var imgUrl=new Array(); 
   var imgLink=new Array();
   var adNum=0;
   var theTimer=0;
   var gameID=1;
   //焦点字框高度样式表 开始

     
      gameID=1;
      imgUrl[gameID] ="./images/top_1.jpg";
      gameID=2;
      imgUrl[gameID] ="./images/top_2.jpg";
      gameID=3;
      imgUrl[gameID] ="./images/top_3.jpg";
      gameID=4;
      imgUrl[gameID] ="./images/top_4.jpg";
      
    
   
   var intPage =0;
   for (var i=1;i<=imgUrl.length;i++)
   {
    if (imgUrl[i]!="!!!")
    {
     intPage++;
    }
   }
   function changeimg(n)
   {
   adNum=n;
    window.clearInterval(theTimer);
    adNum=adNum-1;
   nextAd();
   }
   function goUrl(){
   window.open(imgLink[adNum],'_blank');
   }
   
   //NetScape开始
   if (navigator.appName == "Netscape")
   {
		  function nextAd(){
			if(adNum<(intPage-1))adNum++;
			else adNum=1;
			if( key==0 ){
			 key=1;
			} else if (document.all){
			 document.images.imgInit.filters.BlendTrans.apply();
				playTran();
			   }
			document.images.imgInit.src= imgUrl[adNum];
			theTimer=setTimeout("nextAd()", TimeOut);
		 }
		 
		  document.write('<a target=_self href="javascript:goUrl()"><img style="FILTER: BlendTrans ( duration=1 );" src="javascript:nextAd()" border=0 vspace="0" name=imgInit class="imgClass"></a>');
       nextAd();
   }
   //NetScape结束
   //IE开始
   else
   { 
		   var count=0;
		   for (i=1;i<intPage;i++) {
			    if( (imgUrl[i]!="")) {
				 count++;
				} else {
				 break;
				}
		   }
		      function playTran(){
				if (document.all)
				 document.images.imgInit.filters.BlendTrans.play();  
			   }
   
		  var key=0;
		   function nextAd(){
			if(adNum<count)adNum++ ;
			else adNum=1;
			
			if( key==0 ){
			 key=1;
			} else if (document.all){
			 //imgInit.filters.revealTrans.Transition=6;
			 document.images.imgInit.filters.BlendTrans.apply();
				playTran();
			   }
			document.images.imgInit.src= imgUrl[adNum];
	
	
			theTimer=setTimeout("nextAd()", TimeOut);
			//	alert("time==="+ adNum);
		   }
   
      document.write('<a target=_self href="javascript:goUrl()"><img style="FILTER: BlendTrans ( duration=1 );" src="javascript:nextAd()" border=0 vspace="0" name=imgInit class="imgClass"></a>');
   			changeimg(1);
   }
   //IE结束