Prevent adding a duplicate to a multiselect

diff --git a/core/js/multiselect.js b/core/js/multiselect.js
index ba89c1bb5632ff9a19bdb2f24248773fdb07eb98..c4fd74b0475e746844b554f23d9b94f487de8b45 100644 (file)
--- a/core/js/multiselect.js
+++ b/core/js/multiselect.js
@@ -129,13 +129,24 @@
                                                if(event.keyCode == 13) {
                                                        event.preventDefault();
                                                        event.stopPropagation();
+                                                       var value = $(this).val();
+                                                       var exists = false;
+                                                       $.each(options,function(index, item) {
+                                                               if ($(item).val() == value) {
+                                                                       exists = true;
+                                                                       return false;
+                                                               }
+                                                       });
+                                                       if (exists) {
+                                                               return false;
+                                                       }
                                                        var li=$(this).parent();
                                                        $(this).remove();
                                                        li.text('+ '+settings.createText);
                                                        li.before(createItem(this));
                                                        var select=button.parent().next();
                                                        var option=$('<option selected="selected"/>');
-                                                       option.attr('value',$(this).val());
+                                                       option.attr('value',value);
                                                        option.text($(this).val());
                                                        select.append(option);
                                                        li.prev().children('input').trigger('click');