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 ...

Click the scroll-down arrow in the middle column and select "Add CSS." Enter your custom CSS code in the "Add Custom CSS" box. Click the "Apply to Blog" button located in the right corner of the page.

General Assembly has launched a new online service that teaches basic web development for free, in your browser. It's called Dash, and it lets users learn how to use HTML, Javascript, and CSS by ...