var imgUrl=new Array();
           var imgLink=new Array();
           var adNum=0;
           
           imgUrl[1]="images/ppt.jpg";;;
           imgLink[1]="#1";
           
           imgUrl[2]="images/ppt1.jpg";;;
           imgLink[2]="#2";
		   
	   imgUrl[3]="images/ppt2.jpg";;;
           imgLink[3]="#3";
           
	   imgUrl[4]="images/ppt3.jpg";;;
           imgLink[4]="#4";
           
           var imgPre=new Array();
           var j=0;
           for (i=1;i<=4;i++) {
                 if( (imgUrl!="") && (imgLink!="") ) {
                       j++;
                 } else {
                       break;
                 }
           }
           
           function playTran(){
                 if (document.all)
                       imgInit.filters.item(0).play();
           }
           
           var key=0;
           function nextAd(){
                 if(adNum<j) adNum++ ;
                 else adNum=1;
                 
                 if( key==0 ){
                       key=4;
                 } else if(document.all){
                       imgInit.filters.revealTrans.Transition=60;
                       imgInit.filters.item(0).apply();
                       playTran();
                 }
                 document.images.imgInit.src=imgUrl[adNum];
                 theTimer=setTimeout("nextAd()",5000);  //ËÙ¶È
           }
           
           
           function goUrl(){
                 jumpUrl=imgLink[adNum];
                 jumpTarget='_blank';
                 window.open(jumpUrl,jumpTarget);
                 }