$(function () {
	setHeader();
	setFooter();
});

window.onresize = function () {
	setHeader();
	setFooter();
}

function setHeader() {
	var stageW = $(window).width();
	var header = $("#header");
	var left = (stageW / 2) - 500;
	header.css("left", left + "px");
	header.css("top", "20px");
}

function setFooter() {
	var stageH = $(window).height();
	var footer = $("#footer");
	var top = stageH - footer.height() - 2;
	footer.css("top", top + "px");
}