/////here is my code

package {
import flash.display.MovieClip;
import flash.events.KeyboardEvent;
import flash.events.Event;

public class marioV2Code extends MovieClip {

public function marioV2Code() {

//variables
var dir:String = "stop";
var wCheck :Boolean = false;

//putting the map on the stage
var w:map = new map();
addChild(w);
//putting the tube on the stage
var t:tube = new tube();
w.addChild(t);





//putting mario at the bottom
var m:mario = new mario();
addChild(m);
m.gotoAndStop(1);
m.x = 20;
m.y = 307;

stage.addEventListener(KeyboardEvent.KEY_DOWN, dFun);
function dFun(evt:KeyboardEvent):void {
if (evt.keyCode == 39 && wCheck == false) {
dir = "right";
m.gotoAndPlay(2);
wCheck = true;
}
if (evt.keyCode == 37 && wCheck == false) {
dir = "left";
m.gotoAndPlay(14);
wCheck = true;
}

if (evt.keyCode == 32) {
m.y -=6;
}
}

stage.addEventListener(KeyboardEvent.KEY_UP, uFun);
function uFun(evt:KeyboardEvent):void {
if (evt.keyCode == 39) {
dir = "stop";
m.gotoAndStop(2);
wCheck = false;
}
if (evt.keyCode == 37) {
dir = "stop";
m.gotoAndStop(14);
wCheck = false;
}
}

addEventListener(Event.ENTER_FRAME, mainFun);
function mainFun(evt:Event):void {
moveMario();

if ( m.hitTestObject(t) ) {

if (dir == "right") {
m.x -=1;
w.x +=3;
}
}
}

//functions......
function moveMario():void {
if (dir == "right" && wCheck == true && m.x < 535) {
m.x += 1;
w.x -=3;
if (m.currentFrame == 13) m.gotoAndPlay(3);
} else if (dir == "left" && wCheck == true && m.x > 15) {
m.x -= 1;
w.x += 3;
if (m.currentFrame == 27) m.gotoAndPlay(15);
}
if (m.y < 307) m.y += .6;
}

}

}

}