https://namotka.com/css/menu.js

1// JavaScript Document
2
3navHover = function() {
4        var lis = document.getElementById("navmenu-v").getElementsByTagName("LI");
5        for (var i=0; i<lis.length; i++) {
6                lis[i].onmouseover=function() {
7                        this.className+=" hover";
8                }
9                lis[i].onmouseout=function() {
10                        this.className=this.className.replace(new RegExp(" hover\\b"), "");
11                }
12        }
13}
14if (window.attachEvent) window.attachEvent("onload", navHover);