title: Complete one field automatically
body: <p>I am developing a php/mysql system in the UK.</p>
  
  <p>I gather data for clients including their postcode (zipcode). I also want to enter the ward they live in. I have a table 'clients' which includes the fields 'postcode' and 'wardid' also a table 'wards' which has the fields 'wardid' and 'ward' and finally a table 'zipward' with the fields 'id' 'postcode' and 'wardid'.</p>
  
  <p>On the page that gathers the basic info about the client, once I have entered their postcode I would like the 'ward' entry box to be automatically filled with the correct ward.</p>
  
  <p>I have no idea how to do this. Can anyone assist please?</p>