if(seconds_left>0)
{
        // start the counter
        counterDown();
}

function return_time(seconds, quantity_in, quantity_out)
{
        var result = ((Math.floor(seconds / quantity_in)) % quantity_out).toString();
        if(result.length < 2)
        result = '0' + result;
        return result;
}

function counterDown()
{
        var time = '';
        time += return_time(seconds_left, 3600, 24);
        time += 'h ';
        time += return_time(seconds_left, 60, 60);
        time += 'm ';
        time += return_time(seconds_left, 1, 60);
        time += 's';
        seconds_left--;
        if(seconds_left==0) document.location.reload();
        setTimeout('counterDown()', 1000);
        $('countdown').innerHTML = time;
}