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