diff -r 740712318ab3 -r da9e5973e699 rt/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_String.js
--- a/rt/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_String.js	Thu Oct 03 14:35:09 2013 +0200
+++ b/rt/emul/mini/src/main/resources/org/apidesign/vm4brwsr/emul/lang/java_lang_String.js	Wed Oct 30 17:15:23 2013 +0100
@@ -2,16 +2,16 @@
 vm.java_lang_reflect_Array(false);
 vm.java_lang_String(false);
 
-Array.prototype.at = function(indx, value) {
-  if (indx < 0 || indx >= this.length) {
+Array.at = function(arr, indx, value) {
+  if (indx < 0 || indx >= arr.length) {
       var e = vm.java_lang_ArrayIndexOutOfBoundsException(true);
       e.constructor.cons__VLjava_lang_String_2.call(e, indx.toString());
       throw e;
   }
-  if (arguments.length === 2) {
-      this[indx] = value;
+  if (arguments.length === 3) {
+      arr[indx] = value;
   }
-  return this[indx];
+  return arr[indx];
 };
 Array.prototype.getClass__Ljava_lang_Class_2 = function() {
   return vm.java_lang_Class(false).defineArray__Ljava_lang_Class_2Ljava_lang_String_2(this.jvmName);