Need form submit help

[eluser]Evil Wizard[/eluser]
I assume that is JavaScript?

Using something like jquery to overwrite and hook into the form submit event

Code:

$(document).ready(function () {
    $('#form_id').submit( function () {
                 if(validateLogin()) {
                        $('#form_id').submit();
                 };
                 return false;
        });

forcing the submit to return false all the time prevents the form from being submitted except by execution of code.