Switch function

Hi. I need to use something like a switch function.

I thought it was just "Switch" as it says here (and a couple of other
websites):

http://www.techonthenet.com/excel/formulas/switch.php

but when I try this:

=switch(J4=F2,1,J4=G2,2,3)

I get a name error. I'm using Excel 2003 SP2.

I don't want to use VLookup because I want the value that the function
returns to be from an evaluated formula not from a table and I'm using
references from multiple worksheets.