If anyone can help me with this...

In a FORM, I want to have two TEXT fields. The first one is a regular input field, i e the user enters his firstname.

The second one automatically updates as the user fills in the first one...

Example: User enter "charles" in the first field. At the same time s/he does this, the second field updates and displays "charles@something.net".

The result: you have two fields dependent on each other, where the second field is the first field+some added text.

This should be a part of a FORM that the user submits.

THANKS!!! :)