window.addEvent('domready', function() {
	$('back').addEvent('click', function() {
		window.history.go(-1);
	});
	$('back').addEvent('mouseover', function() {
		$('back').style.color = '#5b5b5b';
		$('back').style.cursor = 'pointer';
	});
	$('back').addEvent('mouseleave', function() {
		$('back').style.color = '#000';
	});
});