var menuItems = document.getElementsByTagName("li");
for(var i = 0; i < menuItems.length; i++){
	var mi = menuItems[i];
	
	if(mi.className == "menu-item"){
		mi.onMouseOver = function(){
			this.className = "hover";
		}

		mi.onMouseOut = function(){
			this.className = "";
		}
	}
}