Hi, I want to validate a list box if it's empty or not. The problem is that there are two list boxes on my pages users can move data from list 1 to list 2 and vice versa ( it was developed by java script of course). Like below: << List 1 < List 2 > >> We want to make sure that List 2 has at list one item in it. It is not important that the list is selected or not? Is there any way to validate that List 2 has at list one item in it using validation frame work? Thank you