window.onload = calculateSpace;
window.onresize = calculateSpace;

function calculateSpace() {
	var w = document.body.clientWidth;
	var h = document.body.clientHeight;
	
	var div;
	window.status = w + " x " + h;
		
	div = document.getElementById("positioner");
	div.style.width = w;
	div.style.height = h;

}