First, some advice: 1. Avoid using id and class values like "left-side" and "right-side". id and class values should describe the content, not the presentation. Otherwise, if you later decide you want them flipped, you'll have to either: a. Modify the content in order to change the presentation (changing the id/class values), which you shouldn't need to change if it's just a presentational change. b. Have an id of "left-side" that styles something to be on the right, which would be confusing.