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: Block Formatting Contexts: Margin Collapsing</title>
5 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
6 <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#block-formatting">
7 <meta name="flags" content="ahem image">
8 <meta name="assert" content="Margins collapse between adjacent block boxes in a block formatting context.">
9 <style type="text/css">
10 #div1
11 {
12 background: url("support/margin-collapse-2em-space.png");
13 font: 20px/1em Ahem;
14 height: 4em;
15 width: 5em;
16 }
17 #div2
18 {
19 margin-bottom: 1em;
20 }
21 #div3
22 {
23 margin-top: 2em;
24 }
25 </style>
26 </head>
27 <body>
28 <p>Test passes if there is no red visible on the page.</p>
29 <div id="div1">
30 <div id="div2">XXXXX</div>
31 <div id="div3">XXXXX</div>
32 </div>
33 </body>
34 </html>