function initMenu()
{
    var nodes = document.getElementById("menu").getElementsByTagName("li");
    for (var i=0; i<nodes.length; i++)
    {
        nodes[i].onmouseover = function()
        {
            this.className += " hover";
        }
        nodes[i].onmouseout = function()
        {
            this.className = this.className.replace(" hover", "");
        }
    }
}
if (document.all && !window.opera) attachEvent("onload", initMenu);