Change images on click of a button?

Question

JavaScript

It is necessary to make it so that when the button is clicked, the images in the second block with the picture change. Wrote the code, but it doesn't work at all. I can't figure out what's wrong. I attach the code:

jsfiddle.net/4Lzypuze/2

thanks

Answer 1

You were pinched by the closure of the campaign. When the handler is called, the i variable is used internally, which does not exist in the global scope on the
UPD page. Just include jquery. jsfiddle.net/4Lzypuze/3 This is how something comes to life