[help] y-axis in side scroll (jet ski)

[astrocalder]

I'm making a game (as a christmas present - deadline coming up) where you jet ski along the x-axis, up makes you jump, and down makes you go into dive mode. when you dive (y<0) you can move up or down a little to explore - press down to keep sinking to the bottom, up to return to the jet ski. i think if i add something like this to my current side scroll code...

if y<0 dive = true;
if dive = true (if button is down (down) y -=5;
if button is down (up) y +=5;
if y>0 ski = true;

(i know it's all ucked fup, but i hope you get the idea)

can anyone translate that into actionscript? i haven't done AS in years and i'm drawing a blank. i think if i see it written out, i'll know where it needs to go, but i can't write it.
i'd copy and paste my code but i'm working on a different computer with no internet. any help much appreciated. happy holidays.

ps - if anyone's interested, i'd be willing to trade art for AS. i work mostly in pixel. i'd love to do more games but i'm no good with AS.

[MD004]

//This is AS 1
if (player._y < 0) {
    ski = false;
    if (Key.isDown(Key.DOWN)) {
        player._y -= 5;
    } else
    if (Key.isDown(Key.UP)) {
        player._y += 5;
    }
} else
if (player._y >= 0) {
    ski=true;
}

Hope that helps. Merry Christmas
~MD