I'm a total newbie web designer trying to get my page to have an option to replace an image with another, and then replace that with another, and so on.

I'm trying to use a timeline to do so. I'm using Ap div tags, but the problem is, whenever I view them in different computers, or when the screen is not maximized the image moves to a different location in the browser.

Should I not use Ap divs? And if not what should I use?
Or should I use something other than a timeline to this?

Thanks.