Can action script control the timing of a movie clip to appear and dissappear?

can action script control the timing of a movie clip to appear and dissappear?

if i want a particular movie clip to appear juz for a fraction of a second, how can i control it using action script?

i actually have a problem wif the keypress, when i press on the ‘a’ key of the keyboard, a movie clip (c1_g) is suppose to be visible, but only for a fraction of a second, then dissappear…

there no actionscript for ‘keypressUp’ i think :-/ … here’s the AS which i use…

on(press, keyPress “a”)
{
c1_g._visible = true;

}

i hope you can understand what i am try to say here and help me…

thank u…