Grid?

Hello! I am not sure if this is what I need or if there is something else out there. I have a grid of 16 images, 4 rows x 4 columns and I need them to randomly show up in different locations on the grid and each image will have a page it links to. This is probably a very simple java script, but I cried during most of my JS class, so forget that. Is this app what I need or is there a script out there that I can use? Oh, and I don’t know where you put scripts, so there’s that…