function scr_timedisp(arg0)
{
    var minutes = floor(arg0 / 1800);
    var remmins = minutes % 60;
    var hours = (minutes - remmins) / 60;
    var seconds = floor((arg0 / 30) - (minutes * 60));
    var hourstring = string(hours) + ":";
    var minstring = string(remmins) + ":";
    if (remmins < 10)
        minstring = "0" + minstring;
    var secstring = string(floor(seconds));
    if (seconds < 10)
        secstring = "0" + secstring;
    var timedisp = hourstring + minstring + secstring;
    return timedisp;
}