I think that you can make it simpler by using the validation through Java Script.
You can assign a function to the submit button. Don't set the button type as a "submit" button. For example:
HTML:
[CODE]

[/CODE] Java Script: [CODE] if(!Form1.F1.value) { return(); } else { Form1.submit(); } [/CODE]
kyle.king.37201 commented: in high security mode internet explorer ignores javescript +0