js实现图片从左往右渐变切换效果的方法

<style type="text/css">
.woon{border:1px solid #fff;}
.wooff{border:1px solid #ffffff;filter:progid:DXImagetransform.Microsoft.Alpha(style=1,opacity=1500,finishOpacity=1);}
</style>
<script language="JavaScript" type="text/JavaScript">
<!--
window.onerror = function(){return true}
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
//-->
</script>
<table width=500 border=0 align=center cellPadding=0 cellSpacing=0  background="http://s16.sinaimg.cn/middle/60d27f6dt7942731cd87f&690">
    <tr>
      <td height="300" align="center">
        <div id=fc style="filter:progid:DXImagetransform.Microsoft.GradientWipe(duration=3,gradientSize=0.5,motion=forward ); WIDTH:500px; HEIGHT:260px; border:1px solid #99cc66">
          <div style="display:block"><A
                  href="#" target=_blank><img onmouseover=clearAuto(); onmouseout=setAuto() height=300 src="https://zhanzhang360.qulang.net/imgupload/007092/60d27f6dtbc987f277bde&690" width=500 border=0></A></div>
        
        <div style="display: none"><a href="#" target="_blank"><img onmouseover=clearAuto(); onmouseout=setAuto() height=300 src="https://zhanzhang360.qulang.net/imgupload/007092/60d27f6dtbc987f42b6b9&690" width=500 border=0></a></div>
        
        <div style="display: none"><A href="#" target=_blank><img onmouseover=clearAuto(); onmouseout=setAuto() height=300 src="https://zhanzhang360.qulang.net/imgupload/007092/60d27f6dtbc987f3c3303&690" width=500 border=0></A></div>
        <div style="display: none"><a href="#" target=_blank><img onmouseover=clearAuto(); onmouseout=setAuto() height=300 src="https://zhanzhang360.qulang.net/imgupload/007092/60d27f6dt7942732166fb&690" width=500 border=0></a></div>
      </div></td>
    </tr>
    <tr>
      <td height=100 valign="top"> <table border=0 align=center cellPadding=0 cellSpacing=1 id=num>     
          <tr>
           
          <td class=woon onmouseover=clearAuto();onclick=Mea(0); onmouseout=setAuto() >
   <img src="https://zhanzhang360.qulang.net/imgupload/007092/60d27f6dtbc987f277bde&690" width="120" height="70" style="cursor: hand" onDblClick="MM_openBrWindow('#','','')"></td>
           
          <td class=wooff onmouseover=clearAuto(); onclick=Mea(1); onmouseout=setAuto() >
      <img src="https://zhanzhang360.qulang.net/imgupload/007092/60d27f6dtbc987f42b6b9&690" width="120" height="70" border="0" style="cursor: hand" onDblClick="MM_openBrWindow('#','','')"></td>
          <td class=wooff onmouseover=clearAuto(); onclick=Mea(2); onmouseout=setAuto() >
   <img src="https://zhanzhang360.qulang.net/imgupload/007092/60d27f6dtbc987f3c3303&690" width="120" height="70" style="cursor: hand" onDblClick="MM_openBrWindow('#','','')"></td>
           
          <td class=wooff onmouseover=clearAuto(); onclick=Mea(3); onmouseout=setAuto() >
   <img src="https://zhanzhang360.qulang.net/imgupload/007092/60d27f6dt7942732166fb&690" width="120" height="70" style="cursor: hand" onDblClick="MM_openBrWindow('#','','')"></td>
      </table>
<script>
var n=0;
var showNum = document.getElementByIdx_x("num");
function Mea(value){
 n=value;
 setBg(value);
 plays(value);
 }
function setBg(value){
 for(var i=0;i<4;i++)
   if(value==i){
  showNum.getElementsByTagName_r("td")[i].className='woon';
  }
 else{
  showNum.getElementsByTagName_r("td")[i].className='wooff';
  }
 }
function plays(value){
 with (fc){
  filters[0].Apply();
  for(i=0;i<4;i++)i==value?children[i].style.display="block":children[i].style.display="none";
  filters[0].play(); 
  }
}
function clearAuto(){clearInterval(autoStart)}
function setAuto(){autoStart=setInterval("auto(n)", 5000)}
function auto(){
 n++;
 if(n>3)n=0;
 Mea(n);
}
function sub(){
 n--;
 if(n<0)n=3;
 Mea(n);
}
setAuto();
</script>
</body>
</html>