Doubt regarding oracle alert message..in apex

I need to have validation messages on my screen immediatley...
i have used plsql block raise _application error dynamic actions to accomplish it If a field is empty and if it goes to some other field then i need the warning message to be dispalyed I am looking for a more better way to acommplish it..Thanks
Kindly help if any one knows a better approch
Edited by: pauljohny on 25-Mar-2012 21:25
Edited by: pauljohny on 25-Mar-2012 21:41

Thanks Gus .. I have not tried Java Script ..I saw one example though but it was for a same field ...
like no1 is the item and you create validation for no1..
I dont know how to acess.. the second .. field via java script..
Actually speaking not tried java script since am not familiar with it..But will be learning its basic today..

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