jQuery.fn.valign = function() {
		$(this)
			.wrapInner('<div class="valign-box"></div>')
			.css("position", "relative");

		xH = $(this).children('.valign-box').height();
		$(this).children('.valign-box')
			.css({
				"position"		: "absolute",
				"height"		: xH,
				"top"			: "50%",
				"margin-top"	: 0-(xH/2)
			});
	};
	
$(document).ready(function() {
		$("#viewer ul li").valign();
	});