用图片作为网页按钮

[javascript]代码库

<script language=JavaScript>
<!-- Hide the script from old browsers --
 function surfto(form) {
        var myindex=document.myform.dest.selectedIndex
        location=document.myform.dest.options[myindex].value;
}
//-->
</script>

<form name="myform">
  <select name="dest" size=1>
    <option selected>选项</option>
    <option value="http://yuncode.net">云代码网站</option>
    <option value="http://www.sohu.com">搜狐网站</option>
    <option value="http://www.sina.com">新浪网站</option>
    <option value="http://www.tom.com">TOM网站</option>
  </select>
  <a href="javascript: surfto()" onMouseOver="self.status='';return true" onMouseOut="self.status='';return true"><img src="ball1.gif" border=0 align=absmiddle></a>
</form>