IE6中的js脚本错误，在线等，先谢谢各位了！

//一下代码可以直接运行，但是在IE6中js脚本报错说不支持自动完成，想问问怎么改？谢谢大家！
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
<title>全面支持火狐的图片切换效果 alixixi.com</title>
<link href="http://book.qq.com/css/ycStyle200905.css" rel="stylesheet" type="text/css" />
</head>
<body>
告诉你一个应有尽有的网页特效网址：<a href="http://js.alixixi.com">http://js.alixixi.com</a>
<hr />
<div style="height:100px;"></div>
<!--[if !IE]>|xGv00|3b5e6c431e9b560f40893a978e9edc81<![endif]-->
<div id="topArea">
 <div class="leftBox1">
     <div class="foc">
          <div id="bigImg" style="filter:progid:DXImageTransform.Microsoft.Fade( duration=0.5,overlap=1.0)">
            <div class="dis"><a href="http://www.alixixi.com" target="_blank"><img src="images/new.jpg" width="231" height="319" onmouseover="clearAuto();" onmouseout="setAuto()" /></a><br /><span><a href="http://www.alixixi.com" target="_blank">血色康乃馨：夜幕下的的葬爱</a></span></div>
            <div class="undis"><a href="http://www.alixixi.com" target="_blank"><img src="images/iscsi.jpg" width="231" height="319" onmouseover="clearAuto();" onmouseout="setAuto()" /></a><br /><span><a href="http://www.alixixi.com" target="_blank">江湖天很晴</a></span></div>
            <div class="undis"><a href="http://www.alixixi.com" target="_blank"><img src="images/storage.jpg" width="231" height="319" onmouseover="clearAuto();" onmouseout="setAuto()" /></a><br /><span><a href="http://www.alixixi.com" target="_blank">绝色女子：情魅凤陵王</a></span></div>
            <div class="undis"><a href="http://www.alixixi.com" target="_blank"><img src="images/security.jpg" width="231" height="319" onmouseover="clearAuto();" onmouseout="setAuto()" /></a><br /><span><a href="http://www.alixixi.com" target="_blank">耗子赖上小仙女：眷恋五百年</a></span></div>
          </div>
          <div class="rbox">
              <div id="thumbImg">
                 <div class="cur">
                 <img src="images/new.jpg" alt="" onclick="Mea(0);" onmouseover="clearAuto();Mea(0);" onmouseout="setAuto()" />
                 </div><p></p>
                 <div class="normal"><img src="images/iscsi.jpg" alt="" onclick="Mea(1);" onmouseover="clearAuto();Mea(1);" onmouseout="setAuto()" />
                 </div><p></p>
                 <div class="normal"><img src="images/storage.jpg" alt="" onclick="Mea(2);" onmouseover="clearAuto();Mea(2);" onmouseout="setAuto()" />
                 </div><p></p>
                 <div class="normal"><img src="images/security.jpg" alt="" onclick="Mea(3);" onmouseover="clearAuto();Mea(3);" onmouseout="setAuto()" />
                 </div>
              </div>
              <div class="more color_717"></div>
          </div>
          <div class="cb"></div>
          <script language="javascript"> 
                var n=0;
                var showImg = document.getElementById("bigImg");
                var showNum = document.getElementById("thumbImg");
               var ie = document.all?true:false;
                function Mea(value){
                    n=value;
                    setBg(value);
                    plays(value);
                }
                function setBg(value){
                  for(var i=0;i<4;i++)
                   if(value==i){showNum.getElementsByTagName("div")[i].className='cur';} 
                    else{showNum.getElementsByTagName("div")[i].className='normal';}  
                  } 
                function plays(value){
                    if(ie){with (bigImg){
                        filters[0].Apply();
                        for(i=0;i<4;i++)i==value?showImg.getElementsByTagName("div")[i].className='dis':showImg.getElementsByTagName("div")[i].className='undis'; 
                        filters[0].play();   
                    }
                    }
                    else{
                                            for(i=0;i<4;i++)i==value?showImg.getElementsByTagName("div")[i].className='dis':showImg.getElementsByTagName("div")[i].className='undis'; 
                    } 
                    }             
                function clearAuto(){clearInterval(autoStart)}
                function setAuto(){autoStart=setInterval("auto(n)", 3000)}
                function auto(){
                    n++;
                    if(n>3)n=0;
                    Mea(n);
                }
       window.onload =  setAuto; 
           </script>
        </div>
  </div>
 
</div>
<div id="vipBox" class="warp960"></div>
<div id="artList"></div>
</body>
</html>