Frontend: Replace Text with image, No-Images-Fallback

replace-text-with-image.css

h1 {
	background: url(image.gif);
	height: 25px;
	text-indent: -999em;
	width: 250px;
	overflow: hidden;
}

replace-text-with-image.html

<h1 id="muster" title="Muster">Muster</h1>

replace-text-with-image.js

function checkImages() {
	if (document.getElementById) {
		var x = document.getElementById('image').offsetWidth;
		if (x != '250') {
			document.getElementById('image').style.textIndent = '0';
		}
	}
}