Oracle Transactional Business Intelligence

Pass Groovy script variable to OTBI Dashboard
Summary
Pass Groovy script variable to OTBI Dashboard
Content
Hi All,
I want to Pass Groovy script variable for OTBI Dashboard from fusion page to Dashboard (Dashboard prompt directly).
The page is designed by groovy script and I have added Dashboard in that page.
For example I want to send the PO number into the Dashboard directly while navigating from Fusion page. FYI I have attached sample screen shot.
Kindly help me regrading this activity.
Regrds,
Vijay