How to get onChange functionlity in webdynpro java....?

HI ALL,
How to get onchange functionality(Like in HTML) when i click on inputfield(F4 -Help value) in web dynpro java . For Inputfield in Properties we are havaing only OnEnter Event only there .
Ex :
I Have 3 Fields
1. 2- Inputfields and 1- F4 Help field
when i click on F4 Help Field i want to show/Hide there remaining 2 - inputfields based on selection.

HI MOVVA.SRAVANI ,
To get that F4 help functionality in WDJ you need to understand the OVS functionality. Please find the below link which could help you understand this functionality.
URL: http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/3073bc25-2c08-2d10-1e82-f6ed25001a13?QuickLink=index&overridelayout=true
Re: Custom UI Elements?
Regards
Uday

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