Question : how to make fields mandatory

hi i have a website designed by someone which i am using i want to make few fields mandatory so that user must fill them before proceding, whow can i do it.

let me know  which files you require so i can upload them here and you can make change or let me know hwat to do

Answer : how to make fields mandatory

Here's a simple RequiredFieldValidator tutorial:

http://asp.net-tutorials.com/validation/required-field-validator/

Arun