text: window.onload = function() {
  	checkImageSizes();
  	var adminBarButton = document.getElementById('wp-admin-bar-resize-detection');
  	if (adminBarButton) {
  		adminBarButton.onclick = function() {
  			clearScaledImages();
  			checkImageSizes();
  		};
  	}
  }
  function checkImageSizes() {
  	// Find images which have width or height different than their natural
  	// width or height, and give them a stark and ugly marker, as well
  	// as a useful title.
  	var imgs = document.getElementsByTagName("img");
  	for (i = 0; i < imgs.length; i++) {
  		imgs[i].classList.remove('scaled-image');
  		checkImageScale(imgs[i]);
  	}
  	return false;
  }
  function checkImageScale(img) {
          if (img.naturalWidth) {
          	if (img.naturalWidth > 25 && img.naturalHeight > 25 && img.clientWidth > 25 && img.clientHeight > 25) {
                  	// For each image with a natural width which isn't
                  	// a 1x1 image, check its size.
  			var dPR = (window.devicePixelRatio || 1);
  			var wrongWidth = (img.clientWidth * 1.5 * dPR < img.naturalWidth);
  			var wrongHeight = (img.clientHeight * 1.5 * dPR < img.naturalHeight);
  			if (wrongWidth || wrongHeight) {
  				img.classList.add('scaled-image');
                  		img.title = "Forced to wrong size: " +
                          	img.clientWidth + "x" + img.clientHeight + ", natural is " +
                          	img.naturalWidth + "x" + img.naturalHeight + "!";
  			}
          	}
          }
  }
  function clearScaledImages() {
  	var scaledImages = document.querySelectorAll('img.scaled-image');
  	for (var i = 0, len = scaledImages.length; i < len; i++){
  		scaledImages[i].classList.remove('scaled-image');
  	}
  }
  document.addEventListener('lazyloaded', function(e){
  	e.target.classList.remove('scaled-image');
          e.target.title = '';
  	checkImageScale(e.target);
  });
  