$('maillingEmailField').addClassName('inactive');
            $('maillingEmailField').parentNode.getElementsByTagName('label')[0].id = 'maillingEmailLabel';
            $('maillingEmailField').value = $('maillingEmailLabel').innerHTML;

            Event.observe($('maillingEmailField'), 'click', function(e){
                var element = e.element();
            
                if (element.value == $('maillingEmailLabel').innerHTML) {
                    element.removeClassName('inactive');
                    element.value = '';
                }
            });

            Event.observe($('maillingEmailField'), 'blur', function(e){
                var element = e.element();
            
                if (element.value == $('maillingEmailLabel').innerHTML || element.value == '') {
                    element.addClassName('inactive');
                    element.value = $('maillingEmailLabel').innerHTML;
                }
            });