Bookmarklet Source Code:
javascript%3A%28function%28%29%7Bfunction%2520toArray%2520%28c%29%7Bvar%2520a%2C%2520k%3Ba%3Dnew%2520Array%3Bfor%2520%28k%3D0%3B%2520k%2520%253C%2520c.length%3B%2520++k%29a%5Bk%5D%3Dc%5Bk%5D%3Breturn%2520a%3B%7Dvar%2520images%2C%2520img%2C%2520altText%3Bimages%3DtoArray%28document.images%29%3Bfor%2520%28var%2520i%3D0%3B%2520i%2520%253C%2520images.length%3B%2520++i%29%7Bimg%3Dimages%5Bi%5D%3BaltText%3Ddocument.createTextNode%28img.alt%29%3Bimg.parentNode.replaceChild%28altText%2C%2520img%29%7D%7D%29%28%29%3B
