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: Height determination for block-level non-replaced elements in normal flow when 'overflow' computes to 'visible' and elements' margins collapse</title>
5 <link rel="author" title="Microsoft" href="http://www.microsoft.com/">
6 <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#normal-block">
7 <meta name="flags" content="">
8 <meta name="assert" content="The 'height' is the distance between the top border edge of the top most block-level child box that doesn't have margins collapsed through it, and the bottom border edge of the bottommost block-level child that doesn't have margins collapsed through it. When a block-level non-replaced element is in normal flow, 'overflow' computes to 'visible' and the 'height' is 'auto'.">
9 <style type="text/css">
10 #div1
11 {
12 position: relative;
13 }
14 #div2, #div3, #div4
15 {
16 width: 1in;
17 }
18 #div2, #div3
19 {
20 background: blue;
21 height: 0.5in;
22 }
23 #div2
24 {
25 border-top: 0.5in solid blue;
26 margin-top: 0.5in;
27 }
28 #div3
29 {
30 border-bottom: 0.5in solid blue;
31 margin-bottom: 0.5in;
32 }
33 #div4
34 {
35 background: blue;
36 height: 2in;
37 left: 1in;
38 position: absolute;
39 top: 0;
40 }
41 </style>
42 </head>
43 <body>
44 <p>Test passes if there is a blue square below.</p>
45 <div id="div1">
46 <div id="div2"></div>
47 <div id="div3"></div>
48 <div id="div4"></div>
49 </div>
50 </body>
51 </html>