[Seaside] getting a single value through jQuery

[Richard Durr]

Hello,
I'd like to set the background-color of a parent element that contains a
selectbox using ajax without replacing the whole. I tried to load the value
through "ajax html:" like so:

html select
  onChange: (html jQuery ajax serialize: html jQuery this) ,
    ((html jQuery this parent: '.model' ) cssAt: 'background-color' put:
(html jQuery ajax html: [:r | r text: 'red' ]));
  callback: [ :value | aModelObject color: value key. ];
  selected: selectedColor;
  addAll: colors;
  labels: [:item | item value.].

But this does not seem to work, since nothing is happening.
Can anybody help?

RD
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