How To Get The CLOSE Event In a JSP File?

Question

Hello everybody,
Right now I am working in a JSP project which is about access log, when the users start , oprate, or close the system, the access log system works. I am in trouble in that when the users close the system, how can I get the close event?
The JSP file contains the following fields :
Close Window
How to add code to get the CLOSE Event and submit to the service?
And If I hit the "Close Button"(on the right-top of the window), how can I get the CLOSE event, too?
Can anyone tell me?

Answer 1

1. Add a hidden field:
<input type="hidden" id="status" value="">2. modify <a href="index.jsp" onclick ="parent.window.close( );">Close Window</a> with <a href="index.jsp" onclick ="closefn();">Close Window</a>3. Add a javascript
<script language="javascript">function closefn(){
document.getElementById('status').value="close";
document.form.action="";
document.form.method="post";
document.form.submit();
parent.window.close( );
}4. Now on the action page get the value of status by request.getParameter("status"); and log it.