QuickForm: Checkbox: Ship To/Bill To

I'm considering using QuickForm for the forms on a shopping cart. I currently have a javascript function I call using OnClick that allows me to provide a user with a checkbox indicating that the BillTo info is the same as the ShipTo info. When the user checks the box, the ShipTo form is filled with the same values from BillTo. How can I implement this using QuickForm? < form name=frmMain> <input type=checkbox name=chkBillShipSame value=1 OnClick="ShipToCopyBillTo()">BillTo information is same as ShipTo </form> Thanks in advance.