[help] How to create simple gravity

[Gloo pot]

Thanks for that code T1ger, i have now gotten it to work but.... it only decelerates left, the right side dosnt seem to work?

Here is my code, I have tryed heeps of ways to get it to work but i cant.
Also thanks again T1ger, you'll notice its much shorter now

 onClipEvent (enterFrame) {
	if (Key.isDown(Key.RIGHT)) {
		acceleration++;
		gotoAndStop(2);
		if (acceleration>speed) {
			acceleration--;
		}
	} else if (Key.isDown(Key.LEFT)) {
		acceleration--;
		gotoAndStop(1);
		if (acceleration<-speed) {
			acceleration++;
		}
//         ****  Deceleration Code  ****
	} else {
		if (acceleration<0) {
			acceleration++;
		} else {
			if (acceleration>0) {
				accerlation--;
			}
		}
	}
	_x += acceleration;
}

P.S. I also tryed the deceleration code with }else if ( rather than what i have now }else{ if (