How do I do this?

I have a table with a field called SerialNumber.  I want to test it for null 
and return a non-breaking space if it's null.

Here's what I tried:

<dtml-if "SerialNumber = null">&nbsp;
<dtml-else><dtml-var SerialNumber>

Doesn't work (be nice-I'm new).  I've tried various combinations of quotes - 
no quotes but apparently haven't hit it just right yet.

What I'm trying to do is stick SOMETHING in an empty cell so netscape 
doesn't remove my borders when it encounters the empty cell - is there an 
easy fix?



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