Get portal session id in WD application

Hi Experts,
We have a Z WD application which is displayed using portal. In this WD application we have a disclaimer pop up that should be displayed to the user only once per user-portal session.
This mean once the user loggs in and clicks on the WD application link for the first time, pop up should be displayed but not for the consecutive clicks of the WD application link in the same portal session.
I tried using the FM TH_GET_SESSION_ID but it gives different session IDs for every click of WD link in the same portal session.
I have read several threads and found out that it is not possible to get this info in WD framework.
So can some one suggest an alternative way to do this based on my requierment?
Let me know if more details are required.
Thanks,
Anubhav
Edited by: Anubhav Jain on Apr 4, 2011 9:21 PM

Hi Abhimanyu / Bhaskaran,
Thanks a lot for the replies, but I can not do anything from portal side.....this has to be from WD side only.
Any more ideas?
Regards,
Anubhav

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