observe_field on multiple select box.

[Salil Gaikwad]

Hi All,

I want to use observe_field on multiple select box.
following is my code

<%= select_tag 'usa[states][]',
options_from_collection_for_select(state, :state, :state, nil),
:multiple => true, :class=>"multi_select" %>
<%= observe_field :usa_states_ , :url =>{:controller=>"logins",:action
=>'multi_select_city', :id=>'1'}, :update=> 'deliverable_city' , :with
=> "'
state='+document.getElementById('usa_states_').value+'&type=restaurant'",
:on=>'click' %>

I want to select the city of the different State i selected through
multiple select box.
My problem is that i get only one value of a state when i click the
multiple states i don't where i'm goin wrong.
Is it possible to use observe_field on multiple select box?

Thanks & Regards,

Salil Gaikwad
--
Posted via http://www.ruby-forum.com/.

[Mukund]

$('usa_states_').value will return the first selected item's value.
It doesn't matter if it is a multiple select. Change your UI a bit.

On Sep 16, 11:13 am, Salil Gaikwad <rails-mailing-l...@andreas-s.net>
wrote:

[Salil Gaikwad]

Hi All,

I found out the solution for this using following link.
1) http://www.mredkj.com/tutorials/tutorial004.html
2) use following javascript to find out how many options are selected
and pass it thorugh observe field.

<script language="JavaScript" type="text/javascript">

function loopSelected(id)
{
var selectedArray = new Array();
var selObj = document.getElementById(id);
var i;
var count = 0;
for (i=0; i<selObj.options.length; i++) {
if (selObj.options[i].selected) {
selectedArray[count] = selObj.options[i].value;
count++;
}
}
return selectedArray;
}

</script>