<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
        "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> 
  <head>
    <title>Prototype Console</title>
    <script src="../dist/prototype.js" type="text/javascript"></script>
    <script type="text/javascript">
      function test() {
        var out = $('out');
        try {
          input = $F('input');
          out.innerHTML += input.escapeHTML() + '<br />';
          value = eval(input);
          out.innerHTML += '=> ' + value.toString().escapeHTML() + '<br />';
        } catch (e) {
          out.innerHTML += 'Error: ' + e.toString().escapeHTML() + '<br />';
        }
        $('input').value = '';
      }
    </script>
  </head>
  <body>
    <form onsubmit="test(); return false">
      <input type="text" size="60" id="input" />
      <input type="submit" value="Execute" />
    </form>
    <div id="test"></div>
    <div id="out"></div>
  </body>
</html>