title: save canvas as jpeg with Internet Explorer
body: <p>I'm using canvas2image to save a 'composite' image. It opens in a new window and can be right clicked and saved.
  This worked great so I presented it to the client who was running IE and of course it didn't work for him!</p>
  
  <p>I have read just about everything related to this on Stackoverflow but not getting anywhere.</p>
  
  <p>How can I get IE to open the canvas and let me save it?</p>
  
  <p>Here is the script I'm using:</p>
  
  <pre><code>$('#save_image_locally').click(function(){
  
          html2canvas($('#picture_frame'), 
           {
              onrendered: function (canvas) {
                  var img = canvas.toDataURL("image/png");
                  alert('Your image will open in a new window. Please right click the image and save.');
                  window.open(img);
              }
           });
          });
  </code></pre>
  
  <p>The new window opens is IE but it's blank.
  I also tried opening the canvas in a div on the same page which works great but IE won't let me right click and save?</p>