function CMenu() {
    var _oBg;
    var _oButPlay;
    var _oFade;
    var _oAudioToggle;
    var _oCreditsBut;
    var _oButFullscreen;
    var _oButSave;
    var _oAreYouSurePanel;
    var _fRequestFullScreen = null;
    var _fCancelFullScreen = null;
    
    var _pStartPosSave;
    var _pStartPosAudio;
    var _pStartPosCredits;
    var _pStartPosFullscreen;

    this._init = function () {
        _oBg = createBitmap(s_oSpriteLibrary.getSprite('bg_menu'));
        s_oStage.addChild(_oBg);

        var oSpritePlay = s_oSpriteLibrary.getSprite('but_play');
        _oButPlay = new CGfxButton((CANVAS_WIDTH / 2), CANVAS_HEIGHT / 2 + 250, oSpritePlay,s_oStage);
        _oButPlay.addEventListener(ON_MOUSE_UP, this._onButPlayRelease, this);

        if (DISABLE_SOUND_MOBILE === false || s_bMobile === false) {
            var oSprite = s_oSpriteLibrary.getSprite('icon_audio');
            _pStartPosAudio = {x: CANVAS_WIDTH - (oSprite.width / 2) + 15, y: (oSprite.height / 2) + 20};
            _oAudioToggle = new CToggle(_pStartPosAudio.x, _pStartPosAudio.y, oSprite, s_bAudioActive);
            _oAudioToggle.addEventListener(ON_MOUSE_UP, this._onAudioToggle, this);
        }
        
        var oSprite = s_oSpriteLibrary.getSprite('but_credits');
        _pStartPosCredits = {x: (oSprite.width/2) + 20, y: (oSprite.height/2) + 20};        
        _oCreditsBut = new CGfxButton(_pStartPosCredits.x,_pStartPosCredits.y,oSprite, s_oStage);
        _oCreditsBut.addEventListener(ON_MOUSE_UP, this._onCreditsBut, this);
        
        var doc = window.document;
        var docEl = doc.documentElement;
        _fRequestFullScreen = docEl.requestFullscreen || docEl.mozRequestFullScreen || docEl.webkitRequestFullScreen || docEl.msRequestFullscreen;
        _fCancelFullScreen = doc.exitFullscreen || doc.mozCancelFullScreen || doc.webkitExitFullscreen || doc.msExitFullscreen;
        
        if(ENABLE_FULLSCREEN === false){
            _fRequestFullScreen = false;
        }

        if (_fRequestFullScreen && screenfull.isEnabled){
            oSprite = s_oSpriteLibrary.getSprite('but_fullscreen');
            
            _pStartPosFullscreen = {x:_pStartPosCredits.x + oSprite.width/2 + 10,y:_pStartPosCredits.y};
            _oButFullscreen = new CToggle(_pStartPosFullscreen.x,_pStartPosFullscreen.y,oSprite,s_bFullscreen,true);
            _oButFullscreen.addEventListener(ON_MOUSE_UP, this._onFullscreenRelease, this);
        }
        
        var oSprite = s_oSpriteLibrary.getSprite("but_clear_save")
        _pStartPosSave = {x:(oSprite.width/2) + 20,y:CANVAS_HEIGHT - oSprite.height/2 - 20};
        _oButSave = new CGfxButton(_pStartPosSave.x,_pStartPosSave.y,oSprite,s_oStage);
        _oButSave.addEventListener(ON_MOUSE_UP,this._onClearSave,this);
        
        _oAreYouSurePanel = new CAreYouSurePanel();
        _oAreYouSurePanel.addEventListener(ON_BUT_YES_DOWN,this._onConfirmClear,this);
        
        if(!s_bStorageAvailable){
            new CAlertSavingBox(TEXT_ERR_LS,s_oStage);
        }
        
        _oFade = new createjs.Shape();
        _oFade.graphics.beginFill("black").drawRect(0, 0, CANVAS_WIDTH, CANVAS_HEIGHT);

        s_oStage.addChild(_oFade);

        createjs.Tween.get(_oFade).to({alpha: 0}, 1000).call(function () {
            s_oStage.removeChild(_oFade);
        });

        this.refreshButtonPos(s_iOffsetX, s_iOffsetY);
    };

    this.unload = function () {
        _oButPlay.unload();
        _oButPlay = null;
        _oButSave.unload();
        
        s_oStage.removeChild(_oBg);
        _oBg = null;

        if (DISABLE_SOUND_MOBILE === false || s_bMobile === false) {
            _oAudioToggle.unload();
            _oAudioToggle = null;
        }
        if (_fRequestFullScreen && screenfull.isEnabled){
            _oButFullscreen.unload();
        }
        
        _oCreditsBut.unload();
        
        s_oMenu = null;
    };

    this.refreshButtonPos = function () {
        if (DISABLE_SOUND_MOBILE === false || s_bMobile === false) {
            _oAudioToggle.setPosition(_pStartPosAudio.x - s_iOffsetX, _pStartPosAudio.y + s_iOffsetY);
        }
        if (_fRequestFullScreen && screenfull.isEnabled){
            _oButFullscreen.setPosition(_pStartPosFullscreen.x + s_iOffsetX,_pStartPosFullscreen.y + s_iOffsetY);
        }
        _oCreditsBut.setPosition(_pStartPosCredits.x + s_iOffsetX,_pStartPosCredits.y + s_iOffsetY);
        _oButSave.setPosition(_pStartPosSave.x + s_iOffsetX,_pStartPosSave.y - s_iOffsetY);
    };

    this._onAudioToggle = function () {
        Howler.mute(s_bAudioActive);
        s_bAudioActive = !s_bAudioActive;
    };

    this._onButPlayRelease = function () {
        this.unload();
        
        
        s_oMain.gotoLevelMenu();
    };
    
    this._onCreditsBut = function(){
        new CCreditsPanel();
    };
    
    this.resetFullscreenBut = function(){
	if (_fRequestFullScreen && screenfull.isEnabled){
		_oButFullscreen.setActive(s_bFullscreen);
	}
    };

    this._onFullscreenRelease = function(){
        if(s_bFullscreen) { 
		_fCancelFullScreen.call(window.document);
	}else{
		_fRequestFullScreen.call(window.document.documentElement);
	}
	
	sizeHandler();
    };
    
    this._onClearSave = function(){
        _oAreYouSurePanel.show(TEXT_CONFIRM_CLEAR_SAVINGS);
    };
    
    this._onConfirmClear = function(){
        s_oMain.clearLocalStorage();
    };
    
    s_oMenu = this;

    this._init();
}

var s_oMenu = null;