Disable/enable entire form's submit with jquery

Question

When my form doesn't validate, I want to disable the form's submit function. I can do this by disabling the submit button, but this would leave the enter key unchecked.
I can set the .submit(return false); but then I can't re-enable it again later.

Any suggestions?

Answer 1

just a simplification of Pim's (edited to pull up James contribution):

$('#form').submit(formValidated);

Answer 2

I did the following, which worked (disable submit button and form submit):

var condition = true; //check whatever you like
if(condition)
    $('input[type=submit]', this).attr('disabled', 'disabled');
    $('form').bind('submit',function(e){e.preventDefault();});
}else{
    $('input[type=submit]', this).removeAttr('disabled', 'disabled');
    $('form').unbind('submit');
}