title: how to make zipcode field takes it value from a dropdown list of cities? and updates
body: <p>woocommerce.
  how to make zipcode field takes it value from a dropdown list of cities after a user select his required city? and updates the checkout so the available shipping options appears
  demo.baytalebaa.com
  at checkout you can see there is a dropdown list of cities . i need the zipcode to take the exact value of the choosen city even if its 'jeddah' for example , and store it. note that the user can change the city and by that it needs to update again,
  <a href="http://prntscr.com/k6mc7b" rel="nofollow noreferrer">http://prntscr.com/k6mc7b</a></p>