title: show selected divs based on drop-down menu choice
body: <p>I'd kindly ask for a help with following situation:</p>
  
  <p>Let's say we have <strong>divs</strong> <code>DIV1</code>, <code>DIV2</code>, <code>DIV3</code> and <code>DIV4</code>.<br>
  Let's say we have <strong>drop-down</strong> menu with choices <code>CHOICE1</code>, <code>CHOICE2</code> and <code>CHOICE3</code>.</p>
  
  <p>I'd like to achieve functionality described below:</p>
  
  <ul>
  <li>If user selects <code>CHOICE1</code>, show <code>DIV1</code>, hide others.</li>
  <li>If user selects <code>CHOICE2</code>, show <code>DIV1</code> and <code>DIV3</code>, hide others.</li>
  <li>If user selects <code>CHOICE3</code>, show <code>DIV2</code>, <code>DIV3</code> and <code>DIV4</code>, hide others.</li>
  </ul>
  
  <p>You got the idea, I believe :-) Thanks for your help, Charlie.</p>