I am trying to find a way to invoke a piece of java code within the JSP using HTML form   
  <form method="get" action="invokeMe()">
       <input type="submit" value="click to submit" />
  </form>
  <%
     private void invokeMe(){
       out.println("He invoked me. I am happy!");   
     }
  %>
the above code is within the JSP. I want this run the scriptlet upon submit
I know the code looks very bad, but I just want to grasp the concept... and how to go about it.
thanks