Quick base64 image encoding

getDataURL.js

// adjust image selector in fn-call
// and run this from the (firebug, etc.) console
(function(imgObj) {
  var imgsrc = imgObj.src;
  var canvas = document.createElement("canvas"),
  ctx = canvas.getContext("2d");
  canvas.width = imgObj.width;
  canvas.height = imgObj.height;
  var newimg = new Image();
  newimg.src = imgsrc;
  newimg.addEventListener("load", function() {
    ctx.drawImage(newimg, 0, 0);
    window.location = canvas.toDataURL();
  }, false);
})(document.images[0]);