 <tr class="expression">
                    <th scope="row">Expression</th>
                    <td><div class="expressionDiv">^(0)$|^([1-9][0-9]*)$</div></td>
                </tr>
                <tr class="description">
                    <th scope="row">Description</th>
                    <td><div class="overflowFixDiv">This regular expression matches on postive whole numbers and 0.  Whole numbers that are left padded with 0&#39;s are not a match.</div></td>
                </tr>
                <tr 