dot Drop-Shadow Box:  Internet Explorer doesn't like "display: table" in the style sheet, so we need a hack:

 
<style type="text/css">
    .DS-container {
      padding: 0px 6px 6px 0px;
      line-height: 0.1;
      display: table-cell;
    }
    .DS-container {                     /* IE hack */
      display: inline-block;
      width: 1px;
    }
    .DS-back {
      position: relative;
      bottom: -6px; right: -6px;        /* double the bottom/right below */
    }
    .DS-front, .DS-middle, .DS-image {
      position: relative;
      bottom: 3px; right: 3px;          /* how much shows */
    }
    .DS-back {
      background-color: #cccccc;        /* second shadow color */
      color: #000000;
    }
    .DS-middle {
      background-color: #666666;        /* first shadow color */
      color: #000000;
    }
    .DS-front {
      background-color: #f8e7c7;        /* background color of content */
      color: #000000;                   /* text color of content */
      border: 1px solid #000000;        /* border color */
      padding: 0px 10px 0px 10px;
      line-height: normal;
    }
    .DS-image {
      border: 1px solid #000000;        /* border color */
    }
</style>

-------------------------------------------------------

<div style="margin-left: 20px;">  
  <div class="DS-container">
    <div class="DS-back">
     <div class="DS-middle">
      <div class="DS-front" align="left">
<pre style="padding: 0;">
  ...contents of the box...
</pre>
  </div></div></div></div>
</div>

dot Inline Shadow Box:  I use the code below to show an  inline shadow box to my viewers: 

 
<style type="text/css">
    .DSI-back {
      border-bottom: 3px solid #cccccc; 
      border-right: 1px solid #cccccc;
      margin: 0px 3px 0px 0px;
    }
    .DSI-middle {
      border-bottom: 2px solid #666666; 
      border-right: 1px solid #666666;
    }
    .DSI-front {
      border: 1px solid black;
      background-color: #f8e7c7;
    }
</style>

-------------------------------------------------------

<span class="DSI-back">
  <span class="DSI-middle">
    <span class="DSI-front">
      content of shadow box
    </span>
  </span>
</span>