请问怎么做出这样的效果？http://www.takungpao.com/

Question

<script>
     function check_explorer()
     {
         var myelement = document.getElementById("menubar"); //那个滚动的DIV
  y_offset = document.body.scrollTop - 1;

myelement.style.top = y_offset;

if (y_offset < 46)
         {
myelement.style.top = 46;
}
      }
      setTimeout("check_explorer()",100)
</script>

Answer 1

那个滚动的DIV的代码怎么写？简单的写成这样不行呀：（
<div id="menubar" style="position:absolute; left:0px; top:46px; width:775px; height:40px; z-index:2;"> 
<table border="0" cellpadding="0" cellspacing="0" width="100">
<tr>
<td>111111111111</td>
</tr>
</table>
</div>