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 - negative margins deducted from zero</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="">
8 <meta name="assert" content="Negative margins are deducted from zero if no positive margins are adjoining.">
9 <style type="text/css">
10 div div
11 {
12 height: 20px;
13 }
14 #div1
15 {
16 background: blue;
17 margin-bottom: 0;
18 }
19 #div2
20 {
21 background: orange;
22 margin-top: -40px;
23 }
24 </style>
25 </head>
26 <body>
27 <p>Test passes if the orange box is above the blue box.</p>
28 <div>
29 <div id="div1"></div>
30 <div id="div2"></div>
31 </div>
32 </body>
33 </html>