Dynamic Sizing of a two element HTML table with one fixed in width

Hi all,

I'm not sure where the question I composed last night went!?  Perhaps
I forgot to put in a ? title and didn't see the error that popped up and
closed the page, or didn't go far enough in the topic area?  (Only things
I can think of).  Hmmph... Anyway...

I have a website that I am developing that employs a Java/DHTML menu system.
Now what I wanted to do seemed simple enough on the surface but isn't.
This menu system is left aligned and is 150 pixels wide.  This menu draws on
the screen overwriting anything that may be underneath it.  The problem is, I want
to be able to use a table with two field elements.  The left one sized to 150 pixels
wide (so that I can insert text/images below or above said menu), and the other to
size dynamically using the current IE browser window width - the 150 pixels for the
menu (for putting in site content).

When I specify the width in % for the second element, it does not work since it will size
according to the entire width of the browser window, and not - the 150 pixels (the
way I want it to).  Is there a way to size the second element dynamically?  What I am
looking for is code that can determine the browser window width that I can then pull
out with a variable.  Something along the lines of what is seen below.  I could have
sworn there was a way to do this in VBScript but perhaps I am mistaken?!  I know
it could be done using native VB and compiling to ActiveX DLL, but that is not an
option.

Any help is greatly appreciated!

TIA,
Bob

<TABLE BGCOLOR="#000000" CELLSPACING="0" CELLPADDING="0" BORDER="1" BORDERCOLOR="#FFFFFF">
  <TR>
      <TD WIDTH="150px">&nbsp;</TD>
      <TD WIDTH="<%=Variable%>">Some Content</TD>
  </TR>
</TABLE>