$(document).ready( function() {
	var windowHeight = $(document).height();
	var marginWrapper = (windowHeight - 578) / 2;
	
	$("#wrap").css("margin-top", marginWrapper);
});

$(window).resize( function() {
	var windowHeight = $(document).height();
	var marginWrapper = (windowHeight - 578) / 2;
	
	$("#wrap").css("margin-top", marginWrapper);
});