Rails spinoffs - Aug 2006 - Highlighting JSON-defined id

Hi all,

I''ve run into a problem that surprised me a bit.

I''ve got a table of items, where each <tr> tag is assigned a
specific ID.

For example:

<table>
<tr id="node-123">
 ...
</tr>
<tr id="node-456">
 ...
</tr>
</table>

On that same page is a form. When the user clicks on a node in the table, an
Ajax.Request is made, values are returned via X-JSON header, and I then use
the onSuccess callback to populate the form with the X-JSON values.

The user can then change the values of the node, and click "Save" ...
an
Ajax.Request posts the form back to the server, and upon successfully saving
the changes, an X-JSON header is set with the new data.

All working well.

What is NOT working:  The X-JSON response from the post back to the server
contains an id number. I''m trying to take that ID, combine it with
"node-",
and highlight the row in the table to indicate that the change took place.

If I manually do:

new Effect.Highlight(''node-123'');

... the row flashes as expected.

On the other hand, if I do:

nodeid = ''node-'' + json.id;
new Effect.Highlight(nodeid);

... nothing happens.

I''ve also attempted:

new Effect.Highlight($(nodeid));

... which doesn''t work either.

I''m stumped on this one. I''ve already checked (typeof nodeid)
is a string,
and that its value is ''node-123''. So ... why wouldn''t
the highlight effect
be working?

I''m truly baffled. Anyone have an idea?

Thank you,
Clay

-- 
Killersoft.com


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It would be helpful to see a functional example, but here is my guess:
You might have a CSS rule for the child TD element. Let''s say, that You
have:

td{ background: #FFF;}

then Effect.Highlight(TRelement) will highlight the TR element, but the
effect itself will be hidden under the white color of the child TD
element, thus it will seem that nothing happens....

Ondra


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