title: Greying out a checkbox when another is checked
body: <p>Basically, I have a list of delivery checkboxes one for deliver to this address and another for deliver to a separate address, I basically want to make it so once one has been checked the other can not be checked out (perhaps by greying it out or something along those lines)</p>
  
  <p>Please be aware that both boxes use the same controls.</p>