Using CFINPUT dateField with onChange

I imagine this is easy, but have tried to search here as well as Google it and have come up empty.

I have a CFINPUT dateField control that is OK when my form loads, but then I want the control to capture a new date selection from the user and update the form. I believe the onChange event is used to process this, but I don't know how to code it so that it will refresh the form using the new date and keep the user's date selection.