Dynamic Form

Hi, Can someone tell me if I can use php to accomplish the following: I would like to create a form that can: A. Total the sum of a certain number of numerical fields, Before the user clicks submit B. Automatically fill in sections of a form based on selections made by the user. As an example, if my user selects option A, then a certain numerical code is filled into a given section of the form. We are just trying to make the forms user friendly. Can I do this in php or will it require javascript as well? Thanks _________________________________________________________________ MSN 8 with e-mail virus protection service: 2 months FREE* http://join.msn.com/?page=features/virus