[Rails-spinoffs] Element.previous() with multiple tbodys?

[Jay Tee]

I have a grid with two <tbody> pairs. (I need to be able to hide
either section of the table).  I'm allowing the user to navigate
between cells of the grid using their keyboard.

When I key up (up arrow) or down (down arrow) within the same tbody,
the cursor moves around like a charm.  But when I get to the first row
of the bottom tbody or the bottom row of the top tbody, the cursor
moves no further.

Here's a snippet: (for up arrow - it's similar to down arrow):

this.up('tr').previous('tr').down('input[type="text"]').activate();

if you have a grid like this:

<table>
  <thead>
    <tr>
      <th>column 1</th>
      <th>column 2</th>
    </tr>
  </thead>
  <tbody id="topsection">
    <tr>
      <th>row 1</th>
      <td><input type="text"></td>
    </tr>
    <tr>
      <th>row 2</th>
      <td><input type="text"></td>
    </tr>
  </tbody>
  <tbody id="bottomsection">
    <tr>
      <th>row 3</th>
      <td><input type="text"></td>
    </tr>
    <tr>
      <th>row 4</th>
      <td><input type="text"></td>
    </tr>
  </tbody>
</table>

If the cursor is in the text field for row 3, the up-arrow won't move
the cursor to row 2.
Likewise if the cursor is in the text field for row 2, the down-arrow
won't move the cursor to row 3.

Any ideas?

Thanks,

Jon
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