window.addEvent('domready', function() {
	if($chk($('avatar'))) {
		$('avatar').addEvent('mouseover', function(event){
			$('avatar_link').setStyle('visibility', 'visible');
		});
		$('avatar').addEvent('mouseout', function(event){
			$('avatar_link').setStyle('visibility', 'hidden');
		});
	}
});