div.informalexample        { background-color: #d5dee3;
                             border-top-width: 2px;
                             border-top-style: double;
                             border-top-color: #d3d3d3;
                             border-bottom-width: 2px;
                             border-bottom-style: double;
                             border-bottom-color: #d3d3d3;
                             padding: 4px;
                             margin: 0em;
                             margin-left: 2em;
                           }

pre.programlisting         { whitespace: pre;
                             font-family: monospace;
                             background-color: #d5dee3;
                             border-top-width: 1px;
                             border-top-style: single;
                             border-top-color: #d3d3d3;
                             border-bottom-width: 1px;
                             border-bottom-style: single;
                             border-bottom-color: #d3d3d3;
                             padding: 4px;
                             margin: 0em;
                           }

div.informalexample pre    { whitespace: pre;
                             font-family: monospace;
                             border-top-width: 0px;
                             border-bottom-width: 0px;
                             padding: 0px;
                           }