cocosjs 按钮添加并切换场景

var ladybugItem =new cc.MenuItemImage(

res.ladybug,

    res.ladybug,

    function () {

// cc.director.replaceScene(cc.TransitionFade(1.2, new LadybugScene()));//这种写法浏览器不可以

        var transition=new cc.TransitionFade(1,new LadybugScene(),false);

        cc.director.runScene(transition);

    }, this);

ladybugItem.setScale(0.333);

ladybugItem.setAnchorPoint(0,0);

ladybugItem.setPosition(size.width/736*434,size.height/414*74);

var ladybug =new cc.Menu(ladybugItem);

ladybug.x =0;

ladybug.y =0;

this.addChild(ladybug, 1);