Closing the Second instance of the browser.

Question

Hello,
I am working on a project written in Java. When applet is running in Browser, we can open the new instance of the browser using File->window->new (or pressing CTR-N). Since the second window runns in the context of first window, It is causing some problem.
Is there any way for me to close the second instance of the browser from my Java applet?? If not is there any way for me to disable both the File->new->Window and CTR-N options.
I am new to java and java script. If it is not possible in Java Applet, is it possible in java Script. Please Provide me with full information.
Thanks and Regards,
Ratna.

Answer 1

Hi,
There is no way you can close the browser window that the user opens. Even if there is a way through some hack, it will not completely give u a solution, independant of browsers and all. And moreover it is not advisable to restrict the user like that.
A more elegant way would be to handle it in the server side. I can give u one ligical way. U can make the page expire as soon as it gets loaded. U can do that by using the code below. And you have to have a server side function to check for a request from the same client machine for the same page.
<%
    if (request.getProtocol().compareTo("HTTP/1.0") == 0)
        response.setHeader("Pragma", "no-cache");
    else if (request.getProtocol().compareTo("HTTP/1.1") == 0)
        response.setHeader("Cache-Control", "no-cache");
    response.setHeader("Expires", "-1");
%>So when the user opens a new browser window, he will be shown page expired message, or the page will be requested again from the server. U can have a map storing the remote address and the session of the user.