initMenu = function()
{
    if(document.all&& document.getElementById)
    {
        cssmenu = document.getElementById("MainMenu");
        for(i=0; i< cssmenu.childNodes.length; i++)
        {
            node = cssmenu.childNodes[i];
            if(node.nodeName=="LI")
            {
                node.onmouseover = function()
                {
                    this.className+=" over";
                }
                node.onmouseout = function()
                {
                    this.className=this.className.replace(" over", "");                        
                }
            }
        }
    }
}
if(window.attachEvent)
    window.attachEvent("onload", initMenu)
else
    window.onload=initMenu;