function getWindowHeight() {
	var windowHeight = 0;
	if (typeof(window.innerHeight)=='number') {
		windowHeight = window.innerHeight;
	} else {
		if (document.documentElement && document.documentElement.clientHeight) {
			windowHeight = document.documentElement.clientHeight;
		} else {
			if (document.body && document.body.clientHeight) {
				windowHeight = document.body.clientHeight;
			}
		}
	}
	return windowHeight;
}
function fillWindow() {
	if (document.getElementById) {
		var windowHeight = getWindowHeight();
		if (windowHeight > 0) {
			var pageElement = document.getElementById('page');
			var pageHeight = pageElement.offsetHeight;
			var footerElement = document.getElementById('footer');
			var footerHeight = footerElement.offsetHeight;
			if (windowHeight >= pageHeight + footerHeight) {
				pageElement.style.height = (windowHeight-footerHeight)+'px';
			} else {
				pageElement.style.height = "";
			}
		}
	}
}
window.onload = fillWindow;
window.onresize = fillWindow;