Checking value after Submit

[Anonymous]

I have a form on a page, that when submited, calls another php file that puts the information into the database. Is there any way to check the value of a field before it gets sent to the "insert.php" file? Or, do I just have to check it at the "insert.php" file, and if it is wrong redirect to the form and fill the fields back in?

TIA!
Fred

 

[Anonymous]

you would need to use javascript -OR- check on the input.php page that it posts to and redirect back to the form.