Using setInterval/clearInterval to cycle through visible-invisible

Question

I've got so confused with setInterval/clearInterval that fail
to code a very
basic effect.
I need an object to become visible for, say 3 sec, then to
become invisible
for 2 sec and so far.
I did three functions:
function objOnAndOff(){
int1=setInterval(objOff,3000);
int2=setInterval(objOn,4998)
function objOff(){obj._visible=false;clearInt(int1)}
function objOn(){obj._visible=true;clearInt(int2)}
obj._visible=true;
var int1,int2,int3
int3=setInterval(objOnAndOff,5000)
I expected objOnAndOff be called every 3+2=5 sec, of which
the object would
stay visible for the first 3 sec, then on 3.001 objOff() sets
it invisible,
then on 4.999 objOn() sets it visible. Immediately after that
objOnAndOff()
is called again and the cycle repeats. Instead it behave
erraticaly.
Where does my logic fail?

Answer 1

Thanks. Amaizingly, I used clearInterval() many times and yet
wrote
clearInt() looked at is many times and failed to notice.
I works in general.
However I have a timer counting down every second and I
planted trace()
into your two functions - the interval shown by the times is
not stable. It
is suppose to be 2 and 3 but timer sometimes shows 1 nd 2
respectively -
Iis is cvorrect to suggest that this is the result of an
inacuracy
accumulated over several cycles and we have this leap year
regularly?
Also is it important that you clearInterval for Off/On BEFORE
setting the
interval for On/Off
In my first attempt I coded similar functions but
clearInterval for Off/On
AFTER setting the interval for On/Off and it did not work,
though I do not
see why this matters.
"kglad" <[email protected]> wrote in message
news:e3bqes$g1p$[email protected]..
> you have a syntax error and an error in flash-logic. to
correct the
syntax
> error use clearInterval() to clear your intervals
(clearInt() is not a
flash
> function).
>
> your error in flash-logic is thinking setInterval()
function calls are
precise
> to within 2 ms. they are not and you're likely to
accumulate
uncontrollable
> calls to objOn().
>
> i don't think pwyon's code will do what you want. try:
>
>
> function objOff(){
> obj._visible=false;
> clearInterval(offI);
> onI=setInterval(objOn,2000);
> }
> function objOn(){
> obj._visible=true;
> clearInterval(onI);
> offI=setInterval(objOff,3000);
> }
> objOn();
>