I have a little button that says "next" below a big image, let´s call it "image1", when I press the button I want to swap the big image to "image2". And then if I press it again I want it to swap to "image3" and the next time to "image4" and so on.

I´m not so good at javascripts but I found a script that can make the button swap "image1" to "image2" when I click it, but the problem comes when I want the same button to swap "image2" to "image3" etc...

Does anyone have a tip?

thanks