<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reference Test</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>
  div.blue
    {
      background-color: rgba(0, 0, 255, 0.5);  /* semi-transparent blue */
      border: black double 18px;
      height: 36px;
      width: 36px;
    }

  div#sub-test1-orange
    {
      background-color: rgba(255, 165, 0, 0.5);  /* semi-transparent orange */
      bottom: 72px; /* offsetHeight == 72px */
      height: 72px;
      left: 72px; /* offsetWidth == 72px */
      position: relative;
      width: 36px;
    }

  div#sub-test21-orange
    {
      background-color: rgba(255, 165, 0, 0.5);  /* semi-transparent orange */
      bottom: 126px; /* 18px + 72px + 36px == 126px */
      height: 18px;
      left: 18px;
      position: relative;
      width: 108px;
    }

  div#sub-test22-orange
    {
      background-color: rgba(255, 165, 0, 0.5);  /* semi-transparent orange */
      bottom: 126px;
      height: 72px;
      left: 72px;
      position: relative;
      width: 54px;
    }

  div#sub-test23-orange
    {
      background-color: rgba(255, 165, 0, 0.5);  /* semi-transparent orange */
      bottom: 126px;
      height: 18px;
      left: 18px;
      position: relative;
      width: 108px;
    }

  div#sub-test3-orange
    {
      background-color: rgba(255, 165, 0, 0.5);  /* semi-transparent orange */
      bottom: 162px;
      height: 36px;
      left: 72px;
      position: relative;
      width: 18px;
    }
  </style>

  <h3>Not inset and Npx 0px: 36px 0px</h3>

  <div class="blue"></div><div id="sub-test1-orange"></div>

  <div class="blue" style="position: relative; bottom: 36px;"></div><div id="sub-test21-orange"></div><div id="sub-test22-orange"></div><div id="sub-test23-orange"></div>

  <div class="blue" style="position: relative; bottom: 108px;"></div><div id="sub-test3-orange"></div>