NaturalWidth and NaturalHeight in IE7 and IE8 via http://www.jacklmoore.com/notes/naturalwidth-and-naturalheight-in-ie/

gistfile1.txt

  function getNatural (DOMelement) {
    var img = new Image();
    img.src = DOMelement.src;
    return {width: img.width, height: img.height};
  }

  var 
  natural = getNatural(document.getElementById('example')),
  nWidth = natural.width,
  nHeight = natural.height;