How to test a script link

Hello all
  How to test a script link?

  E.g. I have a link like this 

  <a href='javascript:showadfeedback()'>welcome!</a>

  and also on this page, defined the function showadfeedback().

  But When trying to click it, but found the functionality are not executed.
Why and what should I do?


  Sample codes

  WebResponse wr = wc.getResponse(url);
  WebLink wl = wr.getFirstMatchingLink(WebLink.MATCH_CONTAINED_TEXT,
"showadfeedback");
  String result = wl.click().getText();
  ...


Thanks in advance!
Chens


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