HTML5复习

新增语义元素

1. section
2. article
3. nav
4. aside
5. header
6. footer
7. figure 与 figcaption

新增表单控件

1. color
2. date
3. datetime
4. datetime-local
5. email
6. month
7. number
8. range
9. search
10. tel
11. time
12. url
13. week