validation for combobox

hi
I have 3 combox box in active widgets.until i select first combo box it should not allow user to enter second combo box i.e the second combo should be disabled like wise until 1st and 2nd filled, 3rd combobox not allowed to enter. please send the code and which event fires on clicking combobox as early as possible.Thanks in advance.

Kiran, the "onCurrentItemChanged" event is fired when you select an item from a combobox. I haven't tried the new disable options in version 2.0.2 but I presume that will work to disable the combo boxes. If not, you can probably override the "showPopup" method on the combo box to prevent the popup from being displayed.