Try passing "true" explicitly:
...
$$('*[id^="match_this_"]').invoke('writeAttribute', 'checked', true);
- kangax
On Apr 28, 12:34 pm, zoopzoop <[EMAIL PROTECTED]> wrote:
> Follow-up question:
>
> I played around a bit and changed my design.
> Now I have some checkboxes (still with ids starting with
> "match_this_") and want to check them all with a click on a link.
>
> function selectAllCheckboxes() {
> $$('*[id^="match_this_"]').invoke('writeAttribute', 'checked');
>
> }
>
> This works fine in IE7 but not in FF2.
> In FF2, it works when I click it the first time but then, when I
> uncheck some checkboxes and click the link again, they don't become
> checked again.
> I don't get any JS error in the error console or Firebug either.
> Does the writeAttribute function have some quirks in FF2?
>
> /z
>
> On Apr 28, 5:41 pm, kangax <[EMAIL PROTECTED]> wrote:> Thanks, T.J. : )
>
> > I'm still in doubt, though, whether "elegant" code is better than
> > straightforward one.
> > If it wasn't straight-obvious for you what the snippet does, there's a
> > big chance it won't be obvious for another developer looking at it (or
> > to myself in half a year) :)
>
> > - kangax
>
> > On Apr 28, 9:36 am, "T.J. Crowder" <[EMAIL PROTECTED]> wrote:
>
> > > @kangax -
>
> > > > elements.shift().observe('click', function(e) {
> > > > elements.invoke('writeAttribute', 'disabled', e.target.checked);
>
> > > That is just so...elegant. Took me a while to figure it out (missed
> > > that part of the OP's question) and *wow* would I comment it, but
> > > seriously: Nice.
> > > --
> > > T.J. Crowder
> > > tj / crowder software / com
>
> > > On Apr 28, 12:23 am, kangax <[EMAIL PROTECTED]> wrote:
>
> > > > I'll try to be careful this time.
>
> > > > 1) Straight-forward way, only checks whether id starts with a string:
> > > > var elements = $$('input[type="checkbox"][id^="match_this_"]');
>
> > > > 2) A little more precise (based on regexp):
> > > > var elements = $$('input[type="checkbox"]').findAll(function(el)
> > > > { return /^match_this_\d$/.test(el.id) });
>
> > > > Then:
>
> > > > elements.shift().observe('click', function(e) {
> > > > elements.invoke('writeAttribute', 'disabled', e.target.checked);
>
> > > > })
>
> > > > - kangax
>
> > > > On Apr 27, 6:40 pm, zoopzoop <[EMAIL PROTECTED]> wrote:
>
> > > > > Hi!
>
> > > > > I want to (as the topic suggests) get a list/array of all elements on
> > > > > a page whose id starts with a string using Prototype.
> > > > > For example, I have several checkboxes like this:
>
> > > > > <input type="checkbox" id="match_this_1">
> > > > > <input type="checkbox" id="match_this_2">
> > > > > <input type="checkbox" id="match_this_3">
> > > > > <input type="checkbox" id="match_this_4">
>
> > > > > I want to find these elements on my page based on the fact that their
> > > > > ids start with "match_this".
> > > > > Then I want to assign a onclick-function to the first checkbox that
> > > > > disables all the other ones.
> > > > > Can somebody help me out with how to do this with Prototype?
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