image replacement technique

dabblet.css

p {
	background: url(http://www.google.com/images/errors/robot.png) no-repeat 0 0;
	height: 400px;
	width: 300px;
	font: 0/0 a;
	color: transparent;
	text-shadow: none
}

dabblet.html

<p>Hi, Google 404 robot!</p>

settings.json

{"view":"split","seethrough":"","prefixfree":"1","page":"all"}