codatory · July 19, 2012 17:43
diff --git a/file.html b/file.html
 <img src="foo.jpg" class="lowres" /><img src="foo2x.jpg" class="hires" />
diff --git a/style.css b/style.css
 .hires {
  display:none;
 }

 @media only screen and (min-device-pixel-ratio: 2) {
  .hires { display: block; }
  .lowres { display: none; }
 }
	.hires {
	display:none;
	}

	@media only screen and (min-device-pixel-ratio: 2) {
	.hires { display: block; }
	.lowres { display: none; }
	}