各位大侠帮帮忙吧

<!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=utf-8" />
<title>无标题文档</title><script language="javascript">
 function atest(thisobj){
   var ok=document.getElementById("a").scrollTop;
   var alldiv=document.getElementsByTagName("yes");
   for(var i=0;i<=alldiv.length;i++){
      if(alldiv[i]!=ok){
    alldiv[i].scrollTop=ok;
  }
   }
 }
   
</script>  <style type="text/css">
   .a{ position:absolute; height:150px; overflow:auto; overflow-y:auto; left: 406px; top: 2px;}
   .b{ position:absolute; height:150px; overflow:auto; overflow-y:auto; top: 2px; }
   .c{ position:absolute; height:150px; overflow:auto; overflow-y:auto; left: 199px; top: 2px; }
  </style>
</head><body>
<div >
<div  class="a"  onscroll="atest(this)" id="a" name="a">
    <p>ppppppppppppppppppppppppp</p> 
        <p>ppppppppppppppppppppppppp </p> 
        <p>ppppppppppppppppppppppppp </p> 
        <p>ppppppppppppppppppppppppp </p> 
        <p>ppppppppppppppppppppppppp </p> 
        <p>ppppppppppppppppppppppppp </p> 
        <p>ppppppppppppppppppppppppp </p> 
        <p>ppppppppppppppppppppppppp </p> 
    </div>
    
  <div class="b" id="yes" name="yes">
    <p>aaaaaaaaaaaaaaaaaaaaaaaaa</p> 
        <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
        <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
        <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
        <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
        <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
        <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
        <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
  </div>
    
    <div class="c" id="yes" name="yes">
      <p>cccccccccccccccccccccccccc</p> 
        <p>cccccccccccccccccccccccccc </p> 
        <p>cccccccccccccccccccccccccc </p> 
        <p>cccccccccccccccccccccccccc </p> 
        <p>cccccccccccccccccccccccccc </p> 
        <p>cccccccccccccccccccccccccc </p> 
        <p>cccccccccccccccccccccccccc </p> 
        <p>cccccccccccccccccccccccccc </p> 
  </div>
    
</div>
</body>
</html>
JS这部分代码究竟哪里出错了呀？？？？？

解决方案 »

  1.   

    <!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=utf-8" />
    <title>无标题文档</title><script type="text/javascript">
     function atest(thisobj){
      var ok=document.getElementById("a").scrollTop;
      var alldiv=document.getElementsByTagName("div");
      for(var i=0;i<alldiv.length;i++){
      if(alldiv[i].scrollTop!=ok){
    alldiv[i].scrollTop=ok;
    }
      }
     }
       
    </script>  <style type="text/css">
      .a{ position:absolute; height:150px; overflow:auto; overflow-y:auto; left: 406px; top: 2px;}
      .b{ position:absolute; height:150px; overflow:auto; overflow-y:auto; top: 2px; }
      .c{ position:absolute; height:150px; overflow:auto; overflow-y:auto; left: 199px; top: 2px; }
      </style>
    </head><body>
    <div >
    <div class="a" onscroll="atest(this)" id="a" name="a">
      <p>ppppppppppppppppppppppppp</p> 
      <p>ppppppppppppppppppppppppp </p> 
      <p>ppppppppppppppppppppppppp </p> 
      <p>ppppppppppppppppppppppppp </p> 
      <p>ppppppppppppppppppppppppp </p> 
      <p>ppppppppppppppppppppppppp </p> 
      <p>ppppppppppppppppppppppppp </p> 
      <p>ppppppppppppppppppppppppp </p> 
      </div>
       
      <div class="b" id="yes" name="yes">
      <p>aaaaaaaaaaaaaaaaaaaaaaaaa</p> 
      <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
      <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
      <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
      <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
      <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
      <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
      <p>aaaaaaaaaaaaaaaaaaaaaaaaa </p> 
      </div>
       
      <div class="c" id="yes" name="yes">
      <p>cccccccccccccccccccccccccc</p> 
      <p>cccccccccccccccccccccccccc </p> 
      <p>cccccccccccccccccccccccccc </p> 
      <p>cccccccccccccccccccccccccc </p> 
      <p>cccccccccccccccccccccccccc </p> 
      <p>cccccccccccccccccccccccccc </p> 
      <p>cccccccccccccccccccccccccc </p> 
      <p>cccccccccccccccccccccccccc </p> 
      </div>
       
    </div>
    </body>
    </html>
    不要这样的粗心啊
      

  2.   

    一楼正解
    var alldiv=document.getElementsByTagName("div");