$( function() {
		var height_mc = $('#mainContainer').height();
		var height_nb = $('#wrapAroundLeft').height();
		var difference = 269;
		var height_min = 475;

		var height_new = height_mc - difference;

		$('#wrapAroundLeft').css("height", height_new);
		
		if ($('#wrapAroundLeft').height() < 570) {
			$('#wrapAroundLeft').css("height", 570);
		}
});