div 使用误解

How not to use the <div> tag

When we first get to grips with HTML and coding in CSS we often get carried away with our divs and surround almost every page item with its own div tags.

How to properly use the <div> tag

The <div> tag is perfectly acceptable to use to define the main page structure, but always try to use more suitable tags for your page elements. Paragraph tags, ordered/unordered lists and definition lists can be more semantic choices.

from：http://line25.com/articles/youre-doing-it-wrong-common-html-tag-misuse