    <table id="help">
      <tr>
        <th width="130">Timer Stop/Start</th>
        <td>Click the `Stop/Start Timer' button.</td>
      </tr>
      <tr>
        <th>psketch Line</th>
        <td>Drag your mouse on the canvas. If the starting and the ending points are far enough, the track becomes connected lines.</td>
      </tr>
      <tr>
        <th>psketch Filled Body</th>
        <td>Drag your mouse on the canvas. If the starting and the ending points are near each other, the track becomes a filled body. Note that you stroke must be convex. If not, the displayed line may not show its physical body.</td>
      </tr>
      <tr>
        <th>Show Physical Body</th>
        <td>Click the `Show Physical Body' button.</td>
      </tr>
      <tr>
        <th>Select Body</th>
        <td>Click a body you want to select. The selected body is inspected and its information is shown on the lower sidebox. Note that the only one body can be selected.</td>
      </tr>
      <tr>
        <th>Fix Body</th>
        <td>Stop the timer, then click the point of the selected body you want to fix.</td>
      </tr>
      <tr>
        <th>Connect Bodies</th>
        <td>Stop the timer, then click the point in the cross area between two bodies you want to connect.</td>
      </tr>
      <tr>
        <th>Move Body</th>
        <td>Stop the timer and select one body, then the body can be dragged.</td>
      </tr>
      <x!--tr>
      <th>Copy Body</th>
      <td>Click the `Copy' button, then the selected body is copied and it will come from the heaven.</td>
      </tr--x>
      <tr>
        <th>Delete Body</th>
        <td>Click the `Delete' button to delete a selected body.</td>
      </tr>
    </table><br />
    <a href="http://www.youtube.com/watch?v=yzvluxWAKJM" target="_blank" style="float:right;">YouTube Video</a>
