I agree with Veena. Its better to move on to sightly rather than working on JSP's anymore.Sightly(HTL) separates out the back end logics to java or javascript use api and front end is just to read the properties, loop the properties and display it. It looks more clean and manageable.

I have checked it in 6.3, it doesn't work there as well. Also etc is not right place for jsp's anyhow.

Hi Sneha,Its better to move out JSP out of etc and place it apps.Move out and do a search and replace of references.

As @riteshrajput suggested it should be available in OOB image component. If you need modifications you can copy it and modify it as per your needs or you can overlay.

There is no OOTB implementation for such behavior I guess. We have to write some jquery code to accomplish that..

Hi Sandhya,Does Country1 and state1,state2 have relation?Like if I select contry1 both state1, state2 should be selected or if I select state1,state2 country1 should be automatically selected something like that.

If you just need a field toggling you can just go through this:Toggle fields based on selection in Granite UI dialogs | Adobe AEM Club

So second dropdown is multiselect?    

Hi Sandhya,Where are you going to load the second drop-down from ?

I hope you should be able to select child nodes by adding the below property.predicate="nosystem"