DHTML Code not working. HELP!

[Weapon-x]

<if condition="$post['field6']">
<div id="h2statsmenu_$post[postid]"><img src="$stylevar[imgdir_misc]/h2stats.gif" alt="View BF2 Stats">
<script type="text/javascript"> vbmenu_register("h2statsmenu_$post[postid]", true); </script>
</div>
<div class="vbmenu_popup" id="h2statsmenu_$post[postid]_menu" style="display:none"><iframe src="http://www.somesite.com/h2stats/stats.swf?playername=$post[field6]" scrolling="no" frameBorder="0" height="120" width="400">$post[field6]</iframe> </div>
</if>

It works in IE but not firefox. How do I get it to work in firefox?
This is going under the postbit_legency under the AIM,MSN,SKYPE,YAHOO Icons. So when someone clicks on the image it will load their H2 Stats within the forum.

But it does not work for me in firefox.