Name:

Clicking on "Submit" should invoke the checkform function again.
The function always returns FALSE which should prevent the "action", load "dummy"

This does not work under NetSurf and an error 404 message is produced.

In order to cancel the submit event, the onSubmit must be in the form onSubmit="return expression".
"return" indicates that the value of the expression should be returned to the submit routine.
If the expression evaluates to false, the submit routine is cancelled;
if it is true, the submit routine goes forward.