Rotate image with javascript

You use a combination of CSS’s transform (with vendor prefixes as necessary) and transform-origin, like this: (also on jsFiddle)

var angle = 0,
  img = document.getElementById('container');
document.getElementById('button').onclick = function() {
  angle = (angle + 90) % 360;
  img.className = "rotate" + angle;
}

#container {
  width: 820px;
  height: 100px;
  overflow: hidden;
}
#container.rotate90,
#container.rotate270 {
  width: 100px;
  height: 820px
}
#image {
  transform-origin: top left;
  /* IE 10+, Firefox, etc. */
  -webkit-transform-origin: top left;
  /* Chrome */
  -ms-transform-origin: top left;
  /* IE 9 */
}
#container.rotate90 #image {
  transform: rotate(90deg) translateY(-100%);
  -webkit-transform: rotate(90deg) translateY(-100%);
  -ms-transform: rotate(90deg) translateY(-100%);
}
#container.rotate180 #image {
  transform: rotate(180deg) translate(-100%, -100%);
  -webkit-transform: rotate(180deg) translate(-100%, -100%);
  -ms-transform: rotate(180deg) translateX(-100%, -100%);
}
#container.rotate270 #image {
  transform: rotate(270deg) translateX(-100%);
  -webkit-transform: rotate(270deg) translateX(-100%);
  -ms-transform: rotate(270deg) translateX(-100%);
}

<button id="button">Click me!</button>
<div id="container">
  <img src="http://i.stack.imgur.com/zbLrE.png" id="image" />
</div>