Movement bug

1

I’m working on a game right now and I’m trying to get a movement script to work properly. The animation for it fudges up when you get lazy with your finger movement(like holding left down and then pressing right to go the other direction). I was just seeing if anybody could help me fix this script. I’m relatively new to actionscript…so yea. Any bit of help would be appreciated.

http://theartistsden.bravehost.com/gangstajoshrpg2.swf

sorry if my code is a bit jumbled. I’ve been trying everything to fix the problem.

/////RPG//////////
onClipEvent (load) {
	// Animation for moving right
	MovieClip.prototype.move_right = function() {
		if ((this._currentFrame<25) && (this._currentFrame>18)) {
		} else if (this._currentFrame<20) {
			this.gotoAndPlay(20);
		}
	};
	//Animate for moving up
	MovieClip.prototype.move_up = function() {
		if ((this._currentFrame<19) && (this._currentFrame>13)) {
		} else if (this._currentFrame<14) {
			this.gotoAndPlay(14);
		}
	};
	//Animating for moving down
	MovieClip.prototype.move_down = function() {
		if ((this._currentFrame<7) && (this._currentFrame>1)) {
		} else if (this._currentFrame<2) {
			this.gotoAndPlay(2);
		}
	};
	//Animation for moving left
	MovieClip.prototype.move_left = function() {
		if ((this._currentFrame<13) && (this._currentFrame>7)) {
		} else if (this._currentFrame<8) {
			this.gotoAndPlay(8);
		}
	};
}
onClipEvent (enterFrame) {
	//COLLISION WITH LEFT
	if (this._x-25<26) {
		speed = 0;
//COLLISION WITH RIGHT SIDE OF BLOCK
	} else if (((this._x-35)<(_root.block._x+25)) && ((this._y-38.0)<(_root.block._y+25)) && ((this._y+38.0)>(_root.block._y-25))) {
		speed = 0;
	} else {
		speed = 10;
	}
	//COLLISION WITH TOP
	if (this._y-38<39) {
		speed_up = 0;
	} else {
		speed_up = 10;
	}
	//COLLISIONG WITH RIGHT
	if (this._x+25>770) {
		speed_right = 0;
	} else {
		speed_right = 10;
	}
	//COLLISION WITH BOTTOM
	if (this._y+38>562) {
		speed_down = 0;
	} else {
		speed_down = 10;
	}
	//moving left
	if ((Key.isDown(37))  {
		this._x -= speed;
	}
	//moving up
	if ((Key.isDown(38))  {
		this._y -= speed_up;
	}
	//moving right
	if ((Key.isDown(39)) {
		this._x += speed_right;
	}
	//moving down
	if ((Key.isDown(40)) {
		this._y += speed_down;
	}
}
on (keyPress "<left>left") {
	if (Key.isDown(38)) {
	} else if (Key.isDown(39)) {
	} else if (Key.isDown(40)) {
	} else if((Key.isDown(40)==false) &&(Key.isDown(39)==false)&& (Key.isDown(38) ==false)){
		this.move_left();
	}
}
on (keyPress "Down<down>") {
	if (Key.isDown(38)) {
	} else if (Key.isDown(39)) {
	} else if (Key.isDown(37)) {
	} else if((Key.isDown(37)==false) &&(Key.isDown(39)==false)&& (Key.isDown(38) ==false)) {
		this.move_down();
	}
}
on (keyPress "Up<up>") {
	if (Key.isDown(40)) {
	} else if (Key.isDown(39)) {
	} else if (Key.isDown(37)) {
	} else if((Key.isDown(37)==false) &&(Key.isDown(39)==false)&& (Key.isDown(40) ==false)){
		this.move_up();
	}
}
on (keyPress "<right>Right") {
	if (Key.isDown(38)) {
	} else if (Key.isDown(40)) {this.gotoAndStop(1);
	} else if (Key.isDown(37)) {
	} else if((Key.isDown(37)==false) &&(Key.isDown(38)==false)&& (Key.isDown(40) ==false)){
		this.move_right();
	}
}
onClipEvent (keyUp) {
	if ((Key.isDown(37) == false) && (Key.isDown(40) == false)) {
		this.gotoAndStop(1);
	}
}

</right></up></down></left>