Index: html/pages/front/default.php
===================================================================
--- html/pages/front/default.php	(revision 4835)
+++ html/pages/front/default.php	(working copy)
@@ -241,7 +241,7 @@
     var base_link = '<?php echo generate_url(array("page" => "devices")); ?>';
     for (var i = 0; i < data.getNumberOfRows(); i++) {
       var latLng = new google.maps.LatLng(data.getValue(i, 0), data.getValue(i, 1));
-      icon_ = 'http://maps.gstatic.com/mapfiles/ridefinder-images/mm_20_green.png';
+      icon_ = '//maps.gstatic.com/mapfiles/ridefinder-images/mm_20_green.png';
 
       var num_up = data.getValue(i, 2);
       var num_down = data.getValue(i, 3);
@@ -249,7 +249,7 @@
       var ratio_up = num_up / (num_up + num_down);
 
       if (ratio_up < 0.9999) {
-        icon_ = 'http://maps.gstatic.com/mapfiles/ridefinder-images/mm_20_red.png';
+        icon_ = '//maps.gstatic.com/mapfiles/ridefinder-images/mm_20_red.png';
       }
 
       var marker = new google.maps.Marker({