<!DOCTYPE html> <html> <head> <title>Bug 1144501 testcase</title> <meta charset="utf-8"> <style type="text/css"> .outer { width: 300px; height: 100px; border: 1px solid silver; margin: 8px 0; display: inline-block; vertical-align: top; } p { margin: 0; background: #eee; } .hr { background-color: green; border: transparent none 0px; height: 10px; margin: 0px; width: 100%; } </style> </head> <body> <div class="outer"> <p style="margin-top:20px"> There should be a horizontal green bar the full width of the div. </p> <div class="hr"></div> </div> <div class="outer"> <p style="margin-right:20px"> There should be a horizontal green bar the full width of the div. </p> <div class="hr"></div> </div> <br> <div class="outer"> <p style="margin-bottom:20px"> There should be a horizontal green bar the full width of the div. </p> <div class="hr"></div> </div> <div class="outer"> <p style="margin-left:20px"> There should be a horizontal green bar the full width of the div. </p> <div class="hr"></div> </div> </body> </html>