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| (Empty) |  | 
 |   1 <!DOCTYPE html> | 
 |   2  | 
 |   3 <html> | 
 |   4 <head> | 
 |   5 <style> | 
 |   6     body { | 
 |   7         margin: 0; | 
 |   8         height: 2000px; | 
 |   9         overflow: hidden; /* hide scrollbars */ | 
 |  10     } | 
 |  11  | 
 |  12     .group { | 
 |  13         display: inline-block; | 
 |  14         position: relative; | 
 |  15         width: 250px; | 
 |  16         height: 500px; | 
 |  17     } | 
 |  18  | 
 |  19     .container { | 
 |  20         width: 200px; | 
 |  21         height: 400px; | 
 |  22         outline: 2px solid black; | 
 |  23     } | 
 |  24  | 
 |  25     .box { | 
 |  26         width: 200px; | 
 |  27         height: 200px; | 
 |  28     } | 
 |  29  | 
 |  30     .sticky { | 
 |  31         position: absolute; | 
 |  32         background-color: green; | 
 |  33     } | 
 |  34  | 
 |  35     .indicator { | 
 |  36         position: absolute; | 
 |  37         top: 0; | 
 |  38         left: 0; | 
 |  39         background-color: red; | 
 |  40     } | 
 |  41 </style> | 
 |  42 </head> | 
 |  43 <body> | 
 |  44     <div class="group" style="top: -100px;"> | 
 |  45         <div class="indicator box" style="top: 200px;"></div> | 
 |  46         <div class="container"> | 
 |  47             <div class="sticky box" style="top: 200px;"></div> | 
 |  48         </div> | 
 |  49     </div> | 
 |  50  | 
 |  51     <div class="group" style="top: 0"> | 
 |  52         <div class="indicator box" style="top: 100px;"></div> | 
 |  53         <div class="container"> | 
 |  54             <div class="sticky box" style="top: 100px;"></div> | 
 |  55         </div> | 
 |  56     </div> | 
 |  57  | 
 |  58     <div class="group" style="top: 100px"> | 
 |  59         <div class="indicator box" style="top: 0;"></div> | 
 |  60         <div class="container"> | 
 |  61             <div class="sticky box" style="top: 0;"></div> | 
 |  62         </div> | 
 |  63     </div> | 
 |  64     <div style="position: absolute; top: 520px;"> | 
 |  65     This test checks that sticky positioned table theads are contained by their 
    table. | 
 |  66     There should be no red. | 
 |  67     </div> | 
 |  68 </body> | 
 |  69 </html> | 
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