[Seaside] jQuery cancel default action

[Boris Popov, DeepCove Labs (SNN)]

Is there a better (more elegant) way of cancelling default action of, say, an anchor when ajax is invoked? That is to support regular callback: when javascript is not available, but prevent page navigation when it is. At the moment I have,

(html anchor)
  callback: [ ... ];
  onClick: (html jQuery ajax script: [:s | ... ]) , (html javascript return: false)

Suggestions?

-Boris (via BlackBerry)
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