How get sprite filename?

cocos2d-x JavaScript
1

Hi, I need obtain the sprite filename, this is possible with getTexture() or getDescription() ?

var mysprite = new cc.Sprite(res.image_png);
mysprite.setName(“myname”);

var myfilename = this.getChildByName(“myname”).getTexture();
cc.log(myfilename); //show: [object Object]

var myfilename2 = this.getChildByName(“myname”).getDescription();
cc.log(myfilename2); //show: getDescription is not a function

I need obtain “image.png” and don´t want use setUserData() and getUserData()

Thanks