Seems if you set OnClientSelectedIndexChanging of your RadListBox to the following function:
you can't use the arrow keys to move off the item at index 0. If you click another item in the list with the mouse, you can use the up and down arrows all you want, until you hit the item at the top of the list (i.e. index 0). Once this item is selected, you are trapped on it in terms of keyboard navigation.
P.S. This bug was noticed under the 2009 Q2 Control Set
function OnClientSelectedIndexChanging_Handler(sender, args) { |
args.set_cancel(true); |
} |
you can't use the arrow keys to move off the item at index 0. If you click another item in the list with the mouse, you can use the up and down arrows all you want, until you hit the item at the top of the list (i.e. index 0). Once this item is selected, you are trapped on it in terms of keyboard navigation.
P.S. This bug was noticed under the 2009 Q2 Control Set