How to do it ?

[jazzandlatin]

Hi
I've got an asp.net page which contains a listbox containing let's say
applications and a Delete button.

When my page is loaded an arraylist is filled containing let' say
again an applicationid per item or not then this arraylist is saved in
a Session variable lets's say TabAppl

What i want to do when i click on DeleteButton :

- popup a specific message asking user to confirm if application
chosen has been saved in TabAppl session variable then eventually
delete application

- popup a standard message asking user to confirm if application
hasn't been found in TabAppl Session variable then eventually delete
application

Can this be done in Javascript (checking in arraylist) and how can i
do it or would you advise another solution to me ? I'm not a pro in
Javascript neither in asp.net. Im using C#

Thanks a lot