Username submit value

[Candyman]

What i'm looking to do is have 3 text boxes with a submit button so when i enter a username in each box that username becomes a value that i can use in this line of code:

Code: Select all

<!-- IF S_USERNAME eq "{value1}" or S_USERNAME eq "{value2}" or S_USERNAME eq "{value3}" -->

I'm sure this is quite simple, but i can't seem to do it?