var chat_users_online = 0;
var tries = 0;

function set_cuo ()
{
    tries++;
    var obj = document.getElementById('chat_uonline');
    if (obj)
    {
        obj.innerHTML = "(" + chat_users_online + ")";
    } else {
        if (tries < 50)
        {
            setTimeout("set_cuo()", 500);
        }
    }
}

set_cuo();