nao funciona no FF

[Elbrinner 0]

Alguem sabe me dizer que parte desse codigo nao funciona no FF e pq?

 

 

<script TYPE="text/javascript"><!--/*Pop up information box II (Mike McGrath (mike_mcgrath@lineone.net,  http://website.lineone.net/~mike_mcgrath))Permission granted to Dynamicdrive.com to include script in archiveFor this and 100's more DHTML scripts, visit http://dynamicdrive.com*/Xoffset=-220;	// modify these values to ...Yoffset= 20;	// change the popup position.var nav,old,iex=(document.all),yyy=-1000;if(navigator.appName=="Netscape"){(document.layers)?nav=true:old=true;}if(!old){var skn=(nav)?document.dek:dek.style;if(nav)document.captureEvents(Event.MOUSEMOVE);document.onmousemove=get_mouse;}function popup(msg,data,classe){var content="<TABLE  WIDTH=220 BORDER=0 style='" + classe +"' BORDERCOLOR=#ffffff CELLPADDING=1 CELLSPACING=0 ><tr><td align=center>"+data+"<br> </td></tr><TR><TD ALIGN=center><FONT FACE=VERDANA SIZE=1>"+msg+"</FONT></TD></TABLE>";if(old){alert(msg);return;} else{yyy=Yoffset; if(nav){skn.document.write(content);skn.document.close();skn.visibility="visible"} if(iex){document.all("dek").innerHTML=content;skn.visibility="visible"} }}function get_mouse(e){var x=(nav)?e.pageX:event.x+document.body.scrollLeft;skn.left=x+Xoffset;var y=(nav)?e.pageY:event.y+document.body.scrollTop;skn.top=y+yyy;}function kill(){if(!old){yyy=-1000;skn.visibility="hidden";}}//--></SCRIPT><!----------Termina aqui----POP-UP------->

obrigado

[Wilker 3]

porque ele usa document.alle isso soh funciona no IE ;)esse codigo ta na lista dos: "very very very old javascript code" :P