Target of pictures

Hi there,

As you can see on my website www.sjoerdstoop.nl I use a very small frame. Gallery can fit in it but my pictures can't. I mean the original pictures. Now I wanna know, is it possible, when you click on a thumb, the photo opens in a new window?

I mean when you click in the thumbnail the SIZED picture will appear in a popup!

I searched for it, but i can't find! If there's somebody who have this working, do me a favour and give me a link with the good files!

Thanks in advance!