diff --git a/index.html b/index.html
index 6f42614..3a09367 100644
--- a/index.html
+++ b/index.html
@@ -27,7 +27,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 	<script type="text/javascript" src="jquery-ui-1.10.4.custom.min.js"></script>
 	<script type="text/javascript" src="jquery-cookie-1.4.0.js"></script>
 	<script type="text/javascript" src="uhr.js"></script>
-	<script type="text/javascript" src="detector.js"></script>
 	<link rel="shortcut icon" type="image/png" href="favicon.png" />
 	<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
 	<link rel="apple-touch-icon-precomposed" href="apple-touch-icon-precomposed.png" />
diff --git a/uhr.js b/uhr.js
index 325cbc8..a2f3110 100644
--- a/uhr.js
+++ b/uhr.js
@@ -24,6 +24,14 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 		languages: [],
 		themes: []
 	};
+	// auto-detect themes
+	var uhrCSSs = $('head link[rel=stylesheet][href^=uhr-]');
+	var matcher = /^(.*)uhr-(.+).css$/;
+	for (var i = 0; i < uhrCSSs.length; i++) {
+		var name = $(uhrCSSs[i]).attr('href');
+		var code = name.match(matcher)[2];
+		window._uhr.themes.push(code);
+	}
 	$.widget("fritteli.uhr", {
 		options: {
 			width: '100%',