//function to change class of menu to enable css dropdown in IE<7
IEMenuHover = function() {
	var menuEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<menuEls.length; i++) {
		menuEls[i].onmouseover=function() {
			this.className+=" ie_menu_hover";
		}
		menuEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" ie_menu_hover\\b"), "");
		}
	}
}

//only for IE - checks for IE only attachEvent
if (window.attachEvent) window.attachEvent("onload", IEMenuHover);