function toggleMenu(id)
    {
        var element=document.getElementById("menu_"+id);
        if(element.style.display=="none"){
            //Practical patch for I.E.
            try {
                element.style.display="table-row";
            }
            catch(error) {
                element.style.display="block";
            }
        } else {
            element.style.display="none";
        }
    }