[Flash8] How to increase number with decimals?

programming flash
1

Hi guys,
I’m new with action script so I’m really sorry if my question sounds silly ^^;

I’m trying to find a script to increase number from 0.00 to 999.99. When I searched online, this script works for me:

timer_txt.text = 0; // start time


function timer(){
    Number(timer_txt.text++);
    if(Number(timer_txt.text == 999)){
        clearInterval(myTimer);
        trace("finished");
    }
}

myTimer = setInterval(timer, 10); // 1000 milliseconds = 1 second
// so the textfield is decreased by 1, every second

Unfortunately, when I tried to put decimals on any number the script stopped to work (e.g timer_txt.text = 0.00; or if(Number(timer_txt.text == 999.99)). When I tried to make the increasement in decimals, it refuses to work as well (Number(timer_txt.text=timer_txt.text+0.55); )

What can I do to make the number increase in decimals? And is it possible to control the increasement? (say +0.55 on every second). I have attached my .fla file if it helps.

Thank you for taking your time to read this post! Any help will be very much appreciated.