| <!doctype html> | |
| <meta charset="utf-8"> | |
| <style> | |
| #button { | |
| width: 400px; | |
| height: 400px; | |
| margin: 100px; | |
| padding: 0; | |
| border: 0; | |
| background-color: purple; | |
| vertical-align: top; | |
| } | |
| #button > div { | |
| width: 100px; | |
| height: 100px; | |
| background-color: green; | |
| } | |
| </style> | |
| <button id="button"> | |
| <div></div> | |
| </button> |