1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
2 <html>
3 <head>
4 <title>CSS Test: Margin collapsing - adjoining block boxes</title>
5 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
6 <link rel="help" href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">
7 <meta name="flags" content="ahem image">
8 <meta name="assert" content="Bottom margin of an in-flow block-level element is always adjoining to the top margin of its next in-flow block-level sibling.">
9 <style type="text/css">
10 div
11 {
12 font: 20px/1em Ahem;
13 width: 5em;
14 }
15 div div
16 {
17 background: green;
18 height: 1em;
19 }
20 #div1
21 {
22 background: url('support/margin-collapse-2em-space.png');
23 }
24 #div2
25 {
26 margin-bottom: 2em;
27 }
28 #div3
29 {
30 margin-top: 2em;
31 }
32 </style>
33 </head>
34 <body>
35 <p>Test passes if there is no red visible on the page.</p>
36 <div id="div1">
37 <div id="div2"></div>
38 <div id="div3"></div>
39 </div>
40 </body>
41 </html>