Hello Anitha,

To clear the old values in WebCombo2 based on your scenario, I suggest you to use OnLostFocus Event in WebCombo1 ClientSideEvent.

You can follow codes bellow :

function WebCombo1_OnLostFocus(controlId) 
   {
      var WebCombo1 = ISGetObject(controlId);
      var WebCombo2 = ISGetObject("WebCombo2");           
      WebCombo2.IsDirty = true;
      WebCombo2.NeedClearList = true;
      WebCombo2.Values = null;
      WebCombo2.ClearSelection();
      WebCombo2.RefreshValueItems();
      return true;
   }

Please let me know is it works as you expect or not ?

Thank you.
Riendy

Thanks Riendy,

It worked fine.

Regards,

Anitha