// JavaScript Document

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 setFooter() {
	if (document.getElementById) {
		var windowHeight = getWindowHeight();
		if (windowHeight > 0) {
			var navElement = document.getElementById('navigation');
			var navHeight = navElement.offsetHeight;
			var homeElement = document.getElementById('index');
			var homeHeight = homeElement.offsetHeight;
			var footerElement = document.getElementById('info');
			var footerHeight  = footerElement.offsetHeight;
				
			if (windowHeight - (homeHeight + footerHeight + navHeight) >= 0) {
				footerElement.style.top = (windowHeight - (homeHeight + footerHeight + navHeight)) + 'px';
			} else {
				footerElement.style.top = '0px';
			}
		}
	}
}

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