Hello All, I am having one webdropdown named Speciality and another webdropdown names SubSpeciality. When I click on one item of Speciality the subspeciality list gets populated. I have used AutoPostBackFlags-SelectionChanged="On" and OnSelectionChanged="wddSpeciality_Selected" for implementing this. My problem is : I need multiple selection in Speciality without autopostback the page and once the multiple selection is made then the SubSpeciality should be populated by all the items together. So if I remove AutoPostBackFlag then the list is not getting populated. please suggest me As soon as you can. Can I use any Java Script or Ajax Script to achieve this? If yes Please give me brief description.