How to hide a custom codelist values dynamically??

Hi ,

Is it possible to hide the some of the codelist values  based on the code list value selected by the user??

EX: i have a custom code list testcode.in that i have values A,B,C,D,E.

If the user select Code lsit values as A , I wanted to show only A and B as the next possible values to set , i wanted to remove C,D,E from the field so that user can not select it from the drop down of this field.

Thanks,

Mani