function show(id)
{
    for (i=0; i<_menu_count; i++){
        hide(i);
    }

    var optionName = _menu_prefix+id;
    
    if (document.layers){
        document.eval(optionName).display = "block";
    } else if (document.getElementById){
        document.getElementById(optionName).style.display = "block";
    }
}

function hide(id)
{
    var optionName = _menu_prefix+id;
    
    if (document.layers){
        document.eval(optionName).display = "none";
    } else if (document.getElementById){
        document.getElementById(optionName).style.display = "none";
    }
}