<html> 
  <head> 
    <title>Calculator</title> 
    <link rel="stylesheet" type="text/css" href="css/calculator.css"/> 
  </head> 
 
  <body> 
    <div id="calculator"> 
      <div id="display"> 
        <div id="display_cell"> 
          <div id="display_scroll"> 
            <table id="display_grid"> 
              <col id="display_gutter"/> 
              <col id="display_main"/> 
              <col id="display_other"/> 
              <!-- the display lines go into this empty tbody --> 
              <tbody id="display_grid_body"/> 
            </table> 
          </div> 
        </div> 
      </div> 
      <div id="divide"> 
        <div><button>+</button></div> 
      </div> 
      <div id="button_pad"> 
        <table> 
          <tbody> 
            <tr> 
              <td><button id="kp_7" class="pad_button">7</button></td> 
              <td><button id="kp_8" class="pad_button">8</button></td> 
              <td><button id="kp_9" class="pad_button">9</button></td> 
              <td><button id="kp_div" class="pad_button round_pad_button">&divide;</button></td> 
            </tr> 
            <tr> 
              <td><button id="kp_4" class="pad_button">4</button></td> 
              <td><button id="kp_5" class="pad_button">5</button></td> 
              <td><button id="kp_6" class="pad_button">6</button></td> 
              <td><button id="kp_mul" class="pad_button round_pad_button">&times;</button></td> 
            </tr> 
            <tr> 
              <td><button id="kp_1" class="pad_button">1</button></td> 
              <td><button id="kp_2" class="pad_button">2</button></td> 
              <td><button id="kp_3" class="pad_button">3</button></td> 
              <td><button id="kp_sub" class="pad_button round_pad_button">&minus;</button></td> 
            </tr> 
            <tr> 
              <td><button id="kp_0" class="pad_button">0</button></td> 
              <td><button id="kp_dot" class="pad_button round_pad_button">.</button></td> 
              <td><button id="kp_eq" class="pad_button round_pad_button">=</button></td> 
              <td><button id="kp_add" class="pad_button round_pad_button">+</button></td> 
            </tr> 
          </tbody> 
        </table> 
      </div> 
    </div> 
    <script type="text/javascript" src="js/calculator.js"></script> 
    <script type="text/javascript"> 
      var calculator = new Calculator();
      window.addEventListener('load', calculator.init.bind(calculator), false);
    </script> 
  </body> 
</html>