ActionScript 2.0 :: Creating Controls - Button OnPress Function

I'm doing a school project in flash that basically has to be a movie trailer, just several photos compiled together with some music. I got bored and now am making controls in Actionscript. I'm using CS4, however I have the document based in Actionscript 2.0. Basically, I have created a rewind button that goes backwards, however now I want it to do one of the two things:

If the video was playing when the button was pressed, I want it to go back to playing when released. If the video was paused the the button was pressed, I want it to continue to stay paused when released. I've tried some very basic if statements, trying to assign boolean statements, but I'm stuck. Here's what I have thus far for my rewind button:

Code:
rewind_button.onPress = function () {
onEnterFrame = function() {
prevFrame();
}}
rewind_button.onRelease = function () {
delete onEnterFrame;
play();
}}