diff --git a/web.go b/web.go
index 0f62577..6cf323b 100644
--- a/web.go
+++ b/web.go
@@ -13,6 +13,8 @@ func init() {
 			return
 		}
 
+		r.ParseForm()
+
 		fmt.Fprintf(w, `<!DOCTYPE html>
 <html>
 <head>
@@ -29,7 +31,7 @@ func init() {
 <script>
 var mandelbrotTypeOptions = {
 	getTileUrl: function(coord, zoom) {
-		return '/mandelbrot/' + zoom + '/' + coord.x + '/' + coord.y + '.png';
+		return '/mandelbrot/' + zoom + '/' + coord.x + '/' + coord.y + '.png?label=%s';
 	},
 	tileSize: new google.maps.Size(128, 128),
 	maxZoom: (1<<16),
@@ -67,6 +69,6 @@ function initialize() {
 <body onload="initialize()">
 <div id="map_canvas"></div>
 </body>
-</html>`)
+</html>`, r.FormValue("label"))
 	})
 }
