Sprite remove and add to Childs

[stwe]

suppose, I have a TileMap and a Button which opens a popup Menu by click.

My popup menu is a sprite (game.add.sprite) which holds some sprites (some Ships) as Child:

popup.addChild(shipArray);

My Tilemap is loading by:

map = game.add.tilemap('Map');
map.addTilesetImage('terrain_atlas', 'terrain_atlas');

background = map.createLayer('Background');
background.resizeWorld();

How do I get the sprite from the popup menu on the tilemap? I have tried the following.

 

// Sprite in the popup menu is clicked
function isShipButtonDown(sprite, pointer) {
    popup.removeChild(sprite);
    sprite.x = 912; // example positions
    sprite.y = 1264;
}

But the sprite is then no longer visible.

[stwe]

Answer to my own question:

 

game.add.existing(sprite);