$.tabs = function(selector, start) {
	$(selector).each(function(i, element) {
		$($(element).attr('tab')).css('display', 'none');
		$(element).click(function() {
			$(selector).each(function(i, element) {
				$(element).removeClass('selected');
				$($(element).attr('tab')).css('display', 'none');
			});
			$(this).addClass('selected');
			$($(this).attr('tab')).css('display', 'block');
		});
	});
	if (!start) start = $(selector).attr('tab');
	$(selector + '[tab=\''+start+'\']').trigger('click');
};