function subgroups_my(obj)
{
    var nested = document.getElementById(obj.id+"_sub");
//alert(nested);

    if(nested.style.display=='none')
    {
        nested.style.display='block';
        document.images['bot'].src='/img/lm_arrow_bot.gif';
        document.images['bot'].width='7';
        document.images['bot'].height='11';
    }
    else
    {
        nested.style.display='none';
        document.images['bot'].src='/img/lm_arrow_r.gif';
        document.images['bot'].width='11';
        document.images['bot'].height='7';
    }

}