title: Javascript change drop-down box options based on another drop-down box value
body: <p>I am practising programming in JavaScript and I have found a problem that must be answered by some experts regarding <code>drop-down</code> boxes.</p>
  
  <p>The Scenario is:</p>
  
  <p>I have a <code>drop-down</code> box that gives some possible options for provinces and also a second one (town) which depends only on what is selected in the provinces <code>drop-down</code>.</p>
  
  <p>Is there a way in JavaScript that when I chose among provinces, the second <code>drop-down</code> gives the options from the province selected?</p>