ieHover = function() {
	var menuElement = document.getElementById("nav").getElementsByTagName("li");
	for (var i=0; i < menuElement.length; i++) {
		menuElement[i].onmouseover = function() {
			this.className = 'ieHover';
		}
		menuElement[i].onmouseout = function() {
			this.className = '';
		}
	}
}
if (window.attachEvent) window.attachEvent('onload', ieHover);

function rollOn(imgName){ document.getElementById(imgName).src = '/images/' + imgName + '_on.gif';}
function rollOff(imgName){ document.getElementById(imgName).src = '/images/' + imgName + '_off.gif';}