| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> |
| <html xmlns="http://www.w3.org/1999/xhtml"> |
| <head> |
| <title>CSS Test: Vertical centering with negative and positive top positioning</title> |
| <link rel="author" title="Microsoft" href="http://www.microsoft.com/" /> |
| <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#positioning-scheme" /> |
| <link rel="match" href="position-relative-nested-001-ref.xht" /> |
| |
| <meta name="flags" content="" /> |
| <meta name="assert" content="Equal 50% positive and negative positioning can vertically center objects." /> |
| <style type="text/css"> |
| #outer |
| { |
| background: green repeat-x center url('support/red_box.png'); |
| /* red_box.png is a 100px by 100px red square */ |
| height: 300px; |
| width: 200px; |
| } |
| #inner |
| { |
| background-color: red; |
| height: 100px; |
| position: relative; |
| top: 50% |
| } |
| #inner-most |
| { |
| background-color: green; |
| height: 150px; |
| /* 150px == top-half of red_box.png's height + #inner's height */ |
| position: relative; |
| top: -50%; |
| /* 50% is 50% of the height of #inner-most's containing block |
| which is #inner */ |
| /* to move the top of the #inner-most box from pixel 150 |
| on the y-axis of #outer to pixel 100 on the y-axis of #outer */ |
| } |
| </style> |
| </head> |
| <body> |
| <p>Test passes if there is <strong>no red</strong>.</p> |
| <div id="outer"> |
| <div id="inner"> |
| <div id="inner-most"></div> |
| </div> |
| </div> |
| </body> |
| </html> |
