window.onload = function() {
	h_body = Window.getHeight('body');
	h_header =$('header').offsetHeight;
	h_footer =$('footer').offsetHeight;
	h_content = h_body-h_header-h_footer;

	$('wrapper_1').setStyles({
		   'min-height': h_content+'px',
		   height: 'auto !important',
		   height: h_content+'px'
	});
}