e="text/css">* { margin: 0; padding: 0 }<![CDATA[
   .container { font: 15px/1 Ahem; background: url(support/swatch-red.png) 45px 0 repeat-y; color: green; }
   .zero {margin-left: 0;}
   .one {margin-left: 3em;}
   .two {margin-left: 3.75ex;}
   .three {margin-left: 45px;}
  ]]></style>
  <link rel="help" href="http://www.w3.org/TR/CSS21/syndata.html#length-units" title="4.3.2 Lengths"/>
 </head>
 <body>
  <p> There should be a solid vertical bar of green below. </p>
  <div class="container">
   <div class