please check out this url:

This is a simplified custom css/js select box i made as the user input for a voting system.
It works perfect under IE6 and Opera7.
But under NS6.2, the box refreshes anormally, and one time out of two it doesn't disappear onmouseout.

Any help ?
Here's the full code

<style type="text/css">
.vote { position:absolute; text-align:center; cursor:hand; width:68px; border:1px #039 solid; padding: 1px 0; text-decoration: none; color: #33A; background: #DDF; }
.chvote { display:none; position:absolute; left:0; top:0; }
.chvote a, .chvote a:visited { width:68px; display:block;  padding: 1px 0; text-decoration: none; color: #33A; background: #DDF; }
.chvote a:hover { background: #FFC; }
.chvote a img { border:0; width:64px; height:12px; }
<script type="text/javascript">
function showvote(which) {
	el = document.getElementById("ch"+which);"block";
function hidevote(which) {
	el = document.getElementById("ch"+which);"none";
<div id="vote222" class="vote" onmouseover="showvote('222');">							
	<div id="ch222" class="chvote" onmouseout="hidevote('222');">
		<a href=""><img src="star00.gif" alt="" /></a>
		<a href=""><img src="star10.gif" alt="" /></a>
		<a href=""><img src="star20.gif" alt="" /></a>
		<a href=""><img src="star30.gif" alt="" /></a>
		<a href=""><img src="star40.gif" alt="" /></a>
		<a href=""><img src="star50.gif" alt="" /></a>