dhtml and tables

[mmmmmike]

I'm using this Coffeecup free dhtml menu creator and I've found that it
generates its code in an absolute format. This is a problem for be because I've
generated my entire site in Dreamweaver 8 using tables and I need to control
exactly where my dhtml menu is located. When I paste my code into the table
code section and preview in IE6, the table does not wrap the location of my
dhtml menu and it gets stuck in the top left corner of the browser. Is there
any good dhtml software that generates code in a relative format - or is there
a way to control exactly where my absolute table is placed within the browser?
Thanks!

[mmmmmike]

Update: I inserted an iframe into my document to hold the JS code, while
allowed me to maneuver the menu as I pleased. Only problem now, is IE and FF
render differently, see here:
Here is what it looks like in IE6:



Looks good. Now, here is what I'm dealing with in Firefox 1.5:



Basically what I have is a grey bar on a redish background. As you can see,
the js menu fails entirely to overlap the red bar in FF1.5, yet it does what
its supposed to in IE6. Same effect on multiple machines.

Here is the relevant source of the index.html file:

<table width="780" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<th height="9" bgcolor="#BF4F40" class="mediumgreen" scope="col"></th>
</tr>
</table>
<table width="780" height="25" border="0" align="center" cellpadding="0"
cellspacing="0">
<tr>
<th width="780" height="25" bgcolor="#99A4A0" scope="col"><iframe
scrolling="no" width="778" height="25" SRC="hello.html"
frameborder="0"></iframe>

</th>
</tr>
</table>

Any reason why FF won't render the menu but IE will?