Event.observe(window, "load", function() {
	var wrapperHeight = $('wrapper').getHeight();
	
	$('footer_ref').setStyle({
		  top: wrapperHeight + 'px'
	});

});

function reposFooter() {
	var wrapperHeight = $('wrapper').getHeight();
	$('footer_ref').setStyle({top: wrapperHeight + 'px'});
}