Javascript is not called in jsp page

Question

Hi,
I have jsp page which actually redirect to another jsp page....
I need to run some javascript code before redirecting to another page
But it seems script got skipped & it goes to desired page
code snippet:
<%@ taglib uri="/ABCTaglib" prefix="AA" %><%response.setContentType("text/xml");%><AA:sitemap pagename="test" />
<script type="text/javascript">
alert("testing");
</script
String answerid = request.getParameter("answerid");
String url = request.getParameter("url");
response.sendRedirect(url);I am expecting an alert "testing" before redirect to another page.
Thanks in advance

Answer 1

Javascript is not java.
Java/JSP runs on the server.
javascript runs on the client, when the browser loads the page.
As far as the server is concerned, all that javascript you have there is just template text to be echoed out in its response.
A redirect will cancel the current response, and send a "redirect" response to tell the client where to go.
Any output written to the response up until the redirect is discarded.
If you want to pop up an alert, you actually have to return a response web page, with that javascript embedded in it, and then have that page navigate onwards to where you want to go (potentially using a meta refresh tag)