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 contentHeight = document.getElementById('container').offsetHeight;
            var footerElement = document.getElementById('footer');
            var footerHeight = footerElement.offsetHeight;
            if (windowHeight-(contentHeight+footerHeight)>=0) {
                footerElement.style.position='relative';
                footerElement.style.top=(windowHeight-(contentHeight+footerHeight))+'px';
            } else {
                footerElement.style.position='static';
            }
        }
    }
}

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