pre.code div.codeblock tt.codetext
    { counter-reset: codeLineCounter; }
pre.code div.codeblock tt.codetext i::before
    { counter-increment: codeLineCounter;
      content: counter(codeLineCounter,decimal-leading-zero) ": ";  
      -moz-user-select: -moz-none;
      -khtml-user-select: none;
      -webkit-user-select: none;
      -ms-user-select: none;
      user-select: none;
      float: left;
      width: 3em;
      text-align: right;
    color: purple; }