I have a form with two fields where first field is a combo box and another 
one is a text box.

As user would select a value from teh combo box (the values are populated 
by calling the database Eg. select distinct username from user). 

The second text box gets its value from the database but here is where i 
have problem?

Second text box gets it value by going agianst database based on teh combo 
box selection. Eg. select userid from user where username='text selected 
from combo box'

Both the field values are then sent to next page.
Can someone please help?
Thanks in advance.

Rinku