[Moo] onSubmit submit button remains disabled when using the back button in FF

[4fingers]

Hi all,

I have some basic Mootools that will disable the submit button when
the user submits the form:

this.form.addEvent('submit', function(e){
        var event = new Event(e);
        var doSubmit = true;
        this.elements.each(function(el,i){
                if(! this.validate(el)){
                        event.stop();
                        doSubmit = false
                        this.list.include(el);
                }else{
                        this.list.erase(el);
                }
        }.bind(this));

        if(doSubmit){
                if(this.options.onSuccess){
                        event.stop();
                        this.options.onSuccess(this.form);
                }else {
                        
this.form.getElement('input[type=submit]').set('disabled',true);
                }
        }
}.bind(this));


This works fine except in Firefox after the form has been submitted
you can then press the back button to see the form again whereby the
submit button is still disabled.

Does anyone have any ideas how to prevent this so that the back button
gives a submit button that is no longer disabled?

Thanks