How to Capture LOV Input Event

1. if (pageContext.isLovEvent())  
2.       {  
3.       System.out.println("Inside LOV Event");  
4.       String lovInputSourceId = pageContext.getLovInputSourceId();  
5. //checking which lov event is fired.  
6. //Below EmployeeLovInput is the ID of messageLovInput  
7.    if ("EmployeeLovInput".equals(lovInputSourceId))  
8.        {  
9.          //Invokes AM Method   
10.             am.invokeMethod("setExtraInfo");  
11.        }  
12. }  

The pageContext.isLovEvent method returns true/Fires if the event value is LOV_UPDATE (meaning the user selected a value from the LOV modal window), or LOV_VALIDATE (meaning the user tabbed out of the LOV input field on the base page).