//by H.Kliewer 2011


function activatemenu(idstring) 
{
//    alert("activate: " + idstring);

    if(idstring ==null)
        return;
    
    var menu = document.getElementsByTagName("a");

    for(idx=0; idx <menu.length; idx++) 
    {
        if(menu[idx].id == idstring)
        {
            menu[idx].style.visibility = "visible";
            menu[idx].style.display = "block";
        }
        else
        {
            if(menu[idx].name == "")
            {
                menu[idx].style.visibility = "hidden";
                menu[idx].style.display = "none";
            }
        }

    };
    
}