I'm wondering if I have a related issue.

I'm creating a form to request credit for customers for various reasons. There may be one reason, or more than one. As a result, I have a top section where the salesman enters in the account number, his ID number, the date, and the amount for the credit. The second section has checkboxes for each reason with a textbox for a detailed explaination. This way, they can select as many reasons as they need to. On the bottom, they enter in the name of the approving manager. Those are required. Optional is the ability to enter their own e-mail address to have the completed form mailed back to themselves, or to e-mail a link to the blank form to someone else.

I need to make sure that the top information (account, sales, date, amount) are filled in, that at least one checkbox is selected, that the textbox associated with that checkbox is filled in, and that there is something in the approval box when the form is submitted.

I want to verify this all client side before it gets submitted to the ASP file that e-mails it.

Would I use a similar method?