var setSize = function () {

		if($('site_container').getSize().size.y > 520 )
		{
		 	$('footer').setStyles({position: 'absolute', top: $('site_container').getSize().size.y});
		}
else
		 	$('footer').setStyles({position: 'absolute'});
	}
window.addEvent("resize", function() { setSize(); } );
window.addEvent("domready", function() { setSize(); } );