Netscape Applet Security showDocument

Question

I posted this on the programming forum, but I thought I'd try in here also.
I am writing a file to the client's filesystem and trying to open that local file in an applet using:
url = new URL("file", "", filename);
// Open a new browser window targeting the file url
this.getAppletContext().showDocument(url, "_blank");
The.java.policy has been modified to grant all permissions This eventually will be a signed applet. The current configuration works okay on IE (6.0). Unfortunately when I run the applet from Netscape 7.1 Nothing happens. There is no error message. The odd thing about this is that I am able to actually write the file to the client filesystem, but the document does not launch in a new window.
I tried it also using Netscape 4.8 and got the following error:
netscape.javascript.JSException: call does not support self.open
at sun.plugin.javascript.navig.Window.call(Unknown Source)
at sun.plugin.viewer.context.DefaultPluginAppletContext$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Again I was permitted to write the files to the local filesystem so I can't understand why I cannot show the document.
What might be the problem? (OS is Windows 2000)

Answer 1

I don't know if I can help you with this.
I am able to run the following applet successfully in my Netscape 7.1 browser on Windows 2000 professional. I am including it for you to try. Although I have a feeling it is probably similar enough to what you have already tried, my interest in this topic has to do with the fact that I am having the same error as you when I run an applet in Camino v0.7 on Mac OS X 10.2 and also an older version of Mozilla 1.0.2 also on the Mac. Like you, I don't see any error messages. The browser simply does not redirect to the new page. The thought here is that if you are not able to redirect a user using an applet that will redirect a user on my own Netscape/Windows environment, maybe then the problem will turn out to be one of configuration (? or not) and hopefully I can solve it somehow on Camino. In any case, I'll be watching this thread hoping for a solution for you.
public class RedirectApplet extends java.applet.Applet
     public void init()
     public void start()
          redirect();
     }// end start
     private void redirect()
          try{
          java.net.URL url
          = new java.net.URL(getCodeBase() + "/WebPage.html");
          this.getAppletContext().showDocument(url, "_self");
          catch(Exception e)
               System.out.println("Error with redirection - " + e.getMessage());
     }// end method
}// end applet class