[AS2] Mario Game

[benw36]

hello everyone
i am coding a mario game and i have my code worked out so i can jump and move and whatnot. but now it comes to the part where i need to hit the blocks and i cannot figure out a hittest that will work.
please help by making a hittest!

the level is in a movieclip (such as the clouds in the background and the blocks i am trying to contact) that movieclip is called "level_mc" and the block movieclip inside the level is called "block1_mc".

ps: i am pretty sure the hittest should be located in that position, if not please specify where it should be.

//variable declarations
onClipEvent(load){
    right = true;
    left = false;
    rduck = false;
    lduck = false;
    rmoving = false;
    lmoving = false;
    ducking = true;
    jumping = false;
    falling = false;
    resetpos = false;
    jump = 15;
//play themesong
    themesong = new Sound(this);
    themesong.attachSound("theme.mp3");
    themesong.start(0,99);
    }

onClipEvent(enterFrame){
    //walking config
    if(Key.isDown(Key.RIGHT)){
        this._xscale = 100;
        this._x = 200;
        right = true;
        left = false;
        rmoving = true;
        _root.level_mc._x -= 8;
        }else{
        rmoving = false;
        }
    if(Key.isDown(Key.LEFT)){
        this._xscale = -100;
        this._x = 224;
        left = true;
        right = false;
        lmoving = true;
        if(_root.level_mc._x <= 200){
            _root.level_mc._x += 8;
        }
        }else{
        lmoving = false;
        }
    if(right && !rmoving||left && !lmoving){
        this.gotoAndPlay(1);
        }
    //duck config 
    if(Key.isDown(Key.DOWN) && ducking){
        this._visible = false;
        _root.duck_mc._x = 200;
        _root.duck_mc._y = 324;
        }else{
        this._visible = true;
        _root.duck_mc._x = -100;
        }
    if(right){
        _root.duck_mc._xscale = 100;
        }
    if(left){
        _root.duck_mc._xscale = -100;
        _root.duck_mc._x += 22;
        }
    //jump config
    if (Key.isDown(Key.UP) && !jumping){
        jumping = true;
        ducking = false;
        jumpsound = new Sound(this);
        jumpsound.attachSound("jump.wav");
        jumpsound.start(0,1);
    }
    if (jumping){
        this.gotoAndStop(4);
        this._y -= jump;
        jump -= 1;
        if(jump<0){
            falling = true;
        }
        if(jump<-15){
            jump = -15;
        }
        HITTEST SHOULD BE HERE !!!!!!!
    }
    //ground hit test
    if (_root.ground_mc.hitTest(this._x+this._width, this._y+this._height, true) && falling){
        jump = 15;
        jumping = false;
        falling = false;
        ducking = true;
        resetpos = true;
    }
    if(resetpos){
        this.gotoAndPlay(1);
        resetpos = false;
        }
}