Chained Dropdownlistbox - MVC

Hi All,,

I have 2 dropdownlist box in my view. i.e, COURSEGROUP and COURSE. When an entry in coursegroup listbox is selected , the COURSE listbox should be enabled and corresponding entries should be filled into the list items.

I have initially disabled the COURSE listbox.

I'm not using Model class for data binding.

My problem is:

When an OnSelect event occurs for COURSEGROUP list box, the control of program is going back to DO_REQUEST method and displays the same screen as earlier. The control is not entring the DO_HANDLE_EVENT method of controller..

I can also send the code if required.

Please help me out,,

Thanks in advance,,

Sachidanand.B