Rails - May 2007 - Drop down list with AJAX(?)

Hi,

I''ve been trying to create a specific drop down list. The list, apart
from normal elements read from a database, should have additional
element called ''Other.'' which when selected should cause the
drop down
list to disappear and change to a standard text area in which the user
can input whatever he wants.

The first part is super simple. The ''select'' method makes the
drop down
list
flawlessly but I can''t figure out how to switch the drop down list with
a text area. I''m guessing you should use AJAX, but as my knowledge of
it
is very low I was wondering if there is a substitute method that makes
it possible (cause this idea seems pretty commonly used). If not, can
someone point to the specific methods that can make this possible, or
even better - a working example. Thanks :-)

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Adam Sosnowski wrote:
> Hi,
> 
> I''ve been trying to create a specific drop down list. The list,
apart
> from normal elements read from a database, should have additional
> element called ''Other.'' which when selected should cause
the drop down
> list to disappear and change to a standard text area in which the user
> can input whatever he wants.
> 
> The first part is super simple. The ''select'' method makes
the drop down
> list
> flawlessly but I can''t figure out how to switch the drop down list
with
> a text area. I''m guessing you should use AJAX, but as my knowledge
of it
> is very low I was wondering if there is a substitute method that makes
> it possible (cause this idea seems pretty commonly used). If not, can
> someone point to the specific methods that can make this possible, or
> even better - a working example. Thanks :-)
1. Use

<option onclick="Element.update(''target-element-id'',
''HTML AS YOU
DESIRE'')">Other</option>

2. Use
<option onclick="<%= remote_function(:update =>
''div_id'', ..more
arguments..)%>">Other                             </option>

where the remote_function part is standard update-an-element with 
server-generated code.



Sorry this is a bit scanty. If you provide more details maybe we can 
fill in the missing pieces.

Stephan

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