title: Functionality Issue using the '.animate()' Function
body: <p>I am working through the jQuery curriculum on CodeCademy and this particular assignment involves using a switch function in conjunction with multiple instances of the '.animate()' function. The 'img' in question is our favorite Italian plumber but he will only move left. When I run the code I get this error returned "
  Oops, try again. It looks like your image doesn't move right when you press 'Right'." </p>
  
  <pre><code>$(document).ready(function() {
      $(document).keydown(function(key) {
          switch(parseInt(key.which,10)) {
              // Left arrow key pressed
              case 37:
                  $('img').animate({left: "-=10px"}, 'fast');
                  break;
              // Up Arrow Pressed
              case 38:
                  $('img').animate({up: "-=10px"}, 'fast');
                  break;
              // Right Arrow Pressed
              case 39:
              $('img').animate({right: "-=10px"}, 'fast');
                  break;
              // Down Arrow Pressed
              case 40:
                  $('img').animate({down: "-=10px"}, 'fast');
                  break;
          }
      });
  }); 
  </code></pre>