Getting attributes from session between two different applications

I'm developing with JDK 1.3 and deploying my webapp at ORACLE 9iAS.
I would like to jump between JSPs deployed at differents OC4J instances and
keep session object. I've seen I can get sessionID and it's the same but the attributes have disapeared.
I jump using JavaScript code (document.location.href).
Should I use a <form> ?
Should I use getServletContext() method ?
I dont know even if it's possible and I don't want to loose my time looking for a solution that doesn't exist.
NEED HELP, AN EXAMPLE OR WHATEVER USEFUL.
... THE SOON AS POSSIBLE
THANX in advance
PS..- I have already look for in this forum but I didn't get any info to solve my doubts. If I mistaken please let me know

Ok.
getServletContext().getContext() may return null in 'security conscious' servers. Apparently this is your case, therefore you wouldn't be able to use it to store global data...
As for sharing sessions directly between different web apps, the servlet spec (since 2.2 at least) explicitely prohibits it.
The link provided by tolmank about pseudo-sessions should address your issue, since it will allow you to distribute your session data on your different webapps.
Some other alternatives would be :
-store the session data in the DB (slow)
-use java serialization
-use RMI
-use JNDI
-if you're using Tomcat, you can implement single-signon accross multiple apps using cookies :
http://www.ingrid.org/jajakarta/tomcat/tomcat-4.0b5/src/catalina/docs/singlesignon.html

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