fixes #2243

app/assets/javascripts/default/sources.js

@@ -0,0 +1,11 @@
+(function() {
+  Danbooru.Sources = {};
+
+  Danbooru.Sources.get = function(url) {
+    $.get("/sources.json", {
+      url: url
+    }).success(function(data) {
+    }).error(function(data) {
+    });
+  }
+})();