Since the button click passes -1 as div1's value and 1 as div2's value, the code makes div2 appear on top of div1 when it runs. Paste the following CSS code into the document's section: ...

Open your Web page and its stylesheet in Notepad or your preferred code editor. In the page code, find the buttons that you want to make bounce and add a class name "bounce" to them: My Button ...