jquery trubz

gistfile1.txt

(function() {
	var box = $('div.box'),
		w = $(window).width() / 2 - box.outerWidth() / 2;
		h= $(window).height() / 2 - box.outerHeight() / 2 ;
	
	$('button').css('position', 'absolute').on("click", function() {
		box.animate({
			'left': w,
			'top': h
		});
        });
})();