| <!doctype html> | |
| <style> | |
| body { | |
| margin: 0; | |
| padding: 0; | |
| } | |
| #box { | |
| background: red; | |
| position: absolute; | |
| top: 0; | |
| left: 0; | |
| width: 100px; | |
| height: 100px; | |
| } | |
| #box.green { | |
| background: green; | |
| } | |
| #box.blue { | |
| background: blue; | |
| } | |
| </style> | |
| <body> | |
| <div id="box" onclick="setColor('green');" ondblclick="setColor('blue');"></div> | |
| <script> | |
| function setColor(c) { | |
| document.getElementById('box').className = c | |
| } | |
| </script> | |
| </body> |