I was trying to go through it with Lionx, but all I know is Visual Basics - which I studied around a year ago so sometimes it's a bit vague to me. Anyways, I think the background changing thing is what Lionx wanted...

...but I'm not sure about the others. I think he wanted to know how to do an image flip (it cycles through different images) and to tell the viewer of the website the version and name of the browser they are using.

Correct me if I'm wrong Lionx. ^^