title: Handle action of drop-down-list in javascript and php in the same form
body: <p>I am trying to create a set of dropdown boxes that are interconnected using PHP and JavaScript. </p>
  
  <p>My objective is to read an input value from a dropdown box, and use it to determine the values of other dropdown boxes. </p>
  
  <p>An example of this is a dropdown list for States where the user takes the following actions:</p>
  
  <ol>
  <li>Choose a State </li>
  <li>Choose the province within that State </li>
  <li>Choose the city within that province</li>
  </ol>
  
  <p>I wish to do something like this, but reading value from the Database and use the afore mentioned techonologies.</p>