function validate() {
	var items = $$('.requiredField')
	var valid = true;
    for (var i = 0; i < items.size(); i++) {
		field = items[i];
		if (field.value == '') {
			valid = false;
			field.style.backgroundColor = 'yellow';
			if ($('intro_alert')) {
				$('intro_alert').innerHTML = 'Some required parts of the form were not filled out correctly. We\'ve highlighted these areas for you. Please complete these areas and submit the form again.';
			}
		}
    }

	return(valid);
}