My bad. Put curly braces ({ and }) around the parameters like this:
{ chosen_option: $F("choose_first") } and you should be good to go.
Or, if you prefer, you can use the following syntax because it looks
more like a url:
parameters: "chosen_option="+$F("choose_first")
It's up to you.
-- Dash --
> I got a bit further. I understand the $F bit now. However, I'm only
> getting the following in my $_GET array in PHP:
>
> Array
> (
> [url] => tests/ships
> [13] =>
> )
>
> so the array's key has become the value I want. how can i get this in
> the same form as the url value?
>
> On 5 Mar, 15:38, "lukemack" <[EMAIL PROTECTED]> wrote:
>
>> thanks very much for your reply.
>>
>> what is $F? I should point out that I am not using this within Rails.
>> I was directed here by someone at the javascript group.
>>
>> your code gives me the following error:
>>
>> Error: missing } after property list
>> Source File: xxxxxxx
>> Line: 33, Column: 32
>> Source Code:
>> "get", parameters: chosen_option: $F("element_id") });
>>
>> thanks,
>>
>> lukemack.
>>
>> On 5 Mar, 14:48, David Dashifen Kees <[EMAIL PROTECTED]> wrote:
>>
>>
>>> You should be able to use an onChange event on the first select box to
>>> create an Ajax.Updater object with a parameter equaling the value of the
>>> select box. Essentially:
>>>
>>> <select id="choose_first" onChange="get_second_list()">
>>> <option>....</option>
>>> </select>
>>>
>>> <div id="second_list"></div>
>>>
>>> <script type="text/javascript">
>>> function get_second_list() {
>>> new Ajax.Updater("second_list", "get_second_list.php", { method:
>>> "get", parameters: chosen_option: $F("choose_first") });
>>> }
>>> </script>
>>>
>>> Your preference for unobtrusive Event.observe() calls versus inline
>>> event handlers may alter the code and there may be better ways to do
>>> this rather than using the empty div, but this should illustrate the
>>> basics. The get_second_list.php page would have to get the value out of
>>> the $_GET array, process it, and construct the neccessary select box
>>> which would be placed in the "second_list" div.
>>>
>>> Write back if you're still confused.
>>>
>>> -- Dash --
>>>
>>> lukemack wrote:
>>>
>>>> hi,
>>>>
>>>> i am trying to make the contents of one drop-down box dependent on the
>>>> contents of another using AJAX (prototype.js) and PHP
>>>>
>>>> I have it working so that a new dropdown appears when i select a value
>>>> in the first dropdown:
>>>>
>>>> <?php echo $html->selectTag('Review/cruiseline', $cruise_lines, null,
>>>> array('onchange'=>'new Ajax.Updater(\'test\', \'ships?variable=12\',
>>>> { method: \'get\' }, {asynchronous:true, evalScripts:true});'), null,
>>>> true, false);?>
>>>>
>>>> In my php script (which is located at URL 'ships'), I am just getting
>>>> the value of 'variable' from the $_GET super global but I obviously
>>>> want that value to be dynamic and equal to the value selected in the
>>>> dropdown.
>>>>
>>>> So the missing piece is passing the selected dropdown value from
>>>> HTML / Javascript to PHP. Anyone know how to do that?
>>>>
>>>> thanks,
>>>>
>>>> lukemack.
>>>>
>
>
> >
>
>
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