图片自动切换（没有过渡效果）

//修改图片的宽度、高度，注意要和下面的一样，修改显示位置
 <style type="text/css">
 #img1 {position:absolute; width:140px; height:105px; left:220px; top:125px; z-index:1; visibility:hidden;}
 #img2 {position:absolute; width:140px; height:105px; left:220px; top:125px; z-index:2}
 </style><SCRIPT LANGUAGE="JavaScript">
 <!-- Begin
 var ie5=(document.getElementByIdx && document.all);
 var ns6=(document.getElementByIdx && !document.all);nPlus = 5   //the % of fading for each step
 speed = 50 // You don't have to edit below this line
 nOpac = 100
 function FadeImg(){
     if(document.getElementByIdx){
         document.getElementByIdx('img1').style.visibility="visible";
         imgs = document.getElementByIdx('img2');
  opacity = nOpac+nPlus;
  nOpac = opacity;
  setTimeout('FadeImg()',speed);
     if(opacity>100 || opacity<0){
         nPlus=-nPlus;
     }
     if(ie5){
         imgs.style.filter="alpha(opacity=0)";
  imgs.filters.alpha.opacity = opacity;
     }
     if(ns6){
         imgs.style.MozOpacity = 0 + '%';
  imgs.style.MozOpacity = opacity + '%';
     }
   }
 }
 οnlοad=FadeImg;
 //  End -->
 </script>
 <div id="img1">
   <img src="017s.jpg" border=0 width=140 height=105>
 </div>
 <div id="img2">
   <img src="013s.jpg" border=0 width=140 height=105>
 </div>