Problemer med script i fire fox.

Af en eller anden grund flipper det her ud i firefox???

<td HEIGHT="24" colspan="14">
<div onclick="popup('select_file.php','FileOpenWindow','100','150'); return false;" id="filer" class="menu_bar_div" onmouseout="file_menu_out(this.id)" onmouseover="file_menu_over(this.id)">Åben filer</div>
<img style="float:left;" src="office_xp_sep.png" alt="-">
<div class="IsFilesOpen" id="file_ex1">Ingen fil åben</div>

</td>