woocommerce picture gallery

Hi there,

I’m not sure what I have done but when you click on the image it displays in another window, I do not want that to happen.

http://www.choobee.co.uk/product/polka-dots/

Instead I want the picture to display in a pop-up box as shown on this website.
http://www.attipas.com.au/shop/polkadot/

Any ideas will be most gratefull