Index: src/django_gheat/website/static/heatmap_extensions.js
===================================================================
--- src/django_gheat/website/static/heatmap_extensions.js	(revision 9269)
+++ src/django_gheat/website/static/heatmap_extensions.js	(revision 9270)
@@ -40,5 +40,5 @@
     dateFormat: "dd/mm/yy",
   });
-
+  var testname = new Array();
   // add slider for signal strength filter
   $("#slider").slider({
@@ -59,5 +59,5 @@
         initialize: function(name, options) {
           var url = [
-            "/website/tile/${z}/${x},${y}.png?colour=0,255,0&signaal__gte=" + sig.values[0] + "&signaal__lte=" + sig.values[1]
+            "/website/tile/${z}/${x},${y}.png?colour=250,250,0&signaal__gte=" + sig.values[0] + "&signaal__lte=" + sig.values[1]
           ];
           options = OpenLayers.Util.extend({ numZoomLevels: 21 }, options);
@@ -67,7 +67,13 @@
       CLASS_NAME: "OpenLayers.Layer.Overlay"
       });
-      signallayer = new OpenLayers.Layer.OSM.Overlay("Signal strength: " + sig.values[0] + " - " + sig.values[1], {isBaseLayer: false, visibility: true});
+      lname = "Signal strength: " + sig.values[0] + " - " + sig.values[1];
+      signallayer = new OpenLayers.Layer.OSM.Overlay(lname, {isBaseLayer: false, visibility: true});
       map.addLayer(signallayer);
     },
+  });
+
+  $("#filter_text").append("<a id=remove>test</a>");
+  $("#remove").click(function(){
+    map.removeLayer(signallayer);
   });