// 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 bannerWrapper = document.getElementById('banner');
			var mainNavigationWrapper = document.getElementById('main_navigation_wrapper');
			var header = document.getElementById('header');
			var content = document.getElementById('content');
			var contentHeight = mainNavigationWrapper.offsetHeight + header.offsetHeight + bannerWrapper.offsetHeight + content.offsetHeight + 45;

			var footerElement = document.getElementById('footer');
			var footerHeight = footerElement.offsetHeight;

			if (windowHeight > (contentHeight + footerHeight)) {
				footerElement.style.position = 'absolute';
				footerElement.style.top = (windowHeight - footerHeight) + 'px';
				footerElement.style.left = '0px';
			}
			else {
				footerElement.style.position = 'relative';
				footerElement.style.top  = '0px';
			}
		}
	}
}

$(document).ready (function() {
	setFooter();
});

$(window).resize (function() {
	setFooter();
});