--- a/src/ztfy/myams/resources/js/myams.js	Tue Nov 17 12:07:17 2015 +0100
+++ b/src/ztfy/myams/resources/js/myams.js	Tue Nov 17 15:40:01 2015 +0100
@@ -2327,8 +2327,10 @@
 				var handler = $(this);
 				var data = handler.data('ams-data');
 				if (data) {
-					for (var index=0; index < data.length; index++) {
-						handler.attr('data-' + index, data[index]);
+					for (var name in data) {
+						if (data.hasOwnProperty(name)) {
+							handler.attr('data-' + name, data[name]);
+						}
 					}
 				}
 			});