var liObj = document.getElementById('menu').getElementsByTagName('li');

// menu item hover
for (var i=0; i<liObj.length; i++) {
	if((liObj[i].className == 'submenuitem') || (liObj[i].className == 'submenuitem active')) {
		liObj[i].onmouseover = function () {
			this.className += ' hover';
		};
		liObj[i].onmouseout = function () {
			this.className = this.className.replace('hover', '');
		};
	}
}