Hello,

  Perhaps the subject is not correct, so I try to
explain what I need. 
  Consider that I have a Tapestry component
A. I expect to have multiple instances of this
component on a page (instantiated in different
places).

  This component needs some javascript to support it.
The javascript side consists of few global 
library methods shared by all instances
of component, BUT called with different sets of 
parameters by different instances of component A.

  (1) I want to be able to attach a script to
my component in such a way that "library"
javascript
methods are created only once per page regardless
of how many instances of component I am creating.

  (2) I realize that I could define a separate script
component on the page with all my global functions.
Nevertheless it has a problem that I should
always remember to append this script component
whenever I am using component A on any given page and
remove it whenever I do not need it anymore. Also
it will cause problems if I nest component A inside
other components, etc.

  I cannot see a simple way to do it presently -
correct me if I am wrong.

  I believe it should be simple to implement in
Tapestry. Basically one has to be able to define
a singleton script - inserted into any given page
only once regardless of how many times script tag
is used in nested components. What about 
adding an extra parameter to the script component?

Parameter = singleton 
Type = boolean
Required = no

  I know that this is what image preload is doing
presently, but I believe it is an internal feature
of Tapestry rather then component.

  Cheers,
   Toly

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