function Rollover (e)
{
	var elem = document.getElementById('footer');
	var name = elem.src.substring(elem.src.lastIndexOf('/'), elem.src.lastIndexOf('.'));
	
	if (e === undefined) {
		name = '/footer.png';
	} else {
		name += '_' + e + '.png';
	}
	
	var source = 'Assets/Images' + name;
	elem.src = source;
}