Problem mit absoluter Positionierung von <div>-Elementen

[Philipp Vallant]

so hier noch der relevante Quelltext:

  
div#pv_m  
{  
  padding: 0px;  
  position: absolute;  
  top:;  
  left:;  
  display: block;  
}  
  
div#pv_m li  
{  
  margin: 0px;  
  padding: 3px;  
  position: relative;  
  list-style: none;  
  float: left;  
  white-space: nowrap;  
}  
  
div#pv_m li#tl div  
{  
  padding: 0px;  
  position: absolute;  
  top: 25px;  
  left: -1px;  
  display: none;  
}  
  
div#pv_m li#tl li  
{  
  margin: 0px;  
  padding: 3px;  
  position: relative;  
  float: none;  
  white-space: nowrap;  
}  

  
<div id="pv_m">  
<ul>  
 <li id="tl"><b>Home</b>  
  <div>  
   <ul>  
    <li><a href="test1.htm">Willkommen</a></li>  
    <li><a href="test1.htm">Top-Angebote</a></li>  
    <li><a href="test1.htm">News</a></li>  
   </ul>  
  </div>|  
 </li>  
</ul>  
</div>