How do you run a servlet with no effect on the browser window?

Is it possible to send parameters to a servlet (using POST or, if necessary, GET) from an application or html page running in a browser, without causing the current browser to be redirected, and without opening a visible new browser window to run the servlet?
If so, can you explain how to do this?

Sure, you could embed it as an image tag.
<img src="http://yourserver/servlets/MyServlet?param1=foo&param2=bar" height=1 width=1>
This will probably produce a broken image in some browsers, unless you have your Servlet send a 1x1 pixel image to its output stream.
-Derek

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