code: function setDivTag(image, img) {
    var setElemStyle = DOM.setStyle(image.element);
    setElemStyle('backgroundImage', 'url(' + img.src + ')');
  
    if (image.preserveAspectRatio) {
      var w, h;
  
      if (image.knownDimensions) {
        w = image.knownDimensions[0];
        h = image.knownDimensions[1];
      } else {
        w = img.width;
        h = img.height;
      }
  
      setElemStyle('backgroundSize', 'cover');
  
      if (image.isFlexible) {
        setElemStyle('paddingBottom', ((h / w) * 100.0) + '%');
      } else {
        setElemStyle('width', w + 'px');
        setElemStyle('height', h + 'px');
      }
    }
  }
docs: Set the image on the div element.
  @param {Element} img Image element.