function getViewportSize() {
  var viewportwidth;
  var viewportheight;
  if (typeof window.innerWidth != "undefined") {
    viewportwidth = window.innerWidth;
    viewportheight = window.innerHeight;
  } else if (typeof document.documentElement != "undefined"
  && typeof document.documentElement.clientWidth !=
  "undefined" && document.documentElement.clientWidth != 0) {
    viewportwidth = document.documentElement.clientWidth;
    viewportheight = document.documentElement.clientHeight;
  } else {
    viewportwidth = document.getElementsByTagName("body")[0].clientWidth;
    viewportheight = document.getElementsByTagName("body")[0].clientHeight;
  }
  return Array(viewportwidth,viewportheight);
}

function alignBg() {
	var dimensions = getViewportSize();
	var hOffset = dimensions[0]/2 - 1441/2;
	if (document.getElementById('floatHeader')) {
		var myHeader = document.getElementById('floatHeader');
		var hOffset = dimensions[0]/2 - 1441/2;
		myHeader.style.left = hOffset+"px";
	}
	if (document.getElementById('floatFooter')) {
		var myFooter = document.getElementById('floatFooter');
		var vOffset = dimensions[1] - 230;
		myFooter.style.left = hOffset+"px";
		myFooter.style.top = vOffset+"px";
	}
}