diff -r fe1a07c17681 -r a7a45e5e5e77 vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Fri Jan 25 15:38:12 2013 +0100
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Fri Jan 25 15:44:09 2013 +0100
@@ -52,7 +52,7 @@
     /*
      * @param resourcePath name of resources to read
      */
-    protected abstract void requireScript(String resourcePath);
+    protected abstract void requireScript(String resourcePath) throws IOException;
     
     /** Allows subclasses to redefine what field a function representing a
      * class gets assigned. By default it returns the suggested name followed
@@ -212,7 +212,7 @@
         out.append("\n    return this;");
         out.append("\n  }");
         out.append("\n  return arguments[0] ? new CLS() : CLS.prototype;");
-        out.append("\n}");
+        out.append("\n};");
         StringBuilder sb = new StringBuilder();
         for (String init : toInitilize.toArray()) {
             sb.append("\n").append(init).append("();");
@@ -945,7 +945,7 @@
                         case 11: jvmType = "[J"; break;
                         default: throw new IllegalStateException("Array type: " + atype);
                     }
-                    emit(out, "var @2 = new Array(@1).initWith('@3', 0);",
+                    emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(true, '@3', @1);",
                          smapper.popI(), smapper.pushA(), jvmType);
                     break;
                 case opc_anewarray: {
@@ -957,7 +957,7 @@
                     } else {
                         typeName = "[L" + typeName + ";";
                     }
-                    emit(out, "var @2 = new Array(@1).initWith('@3', null);",
+                    emit(out, "var @2 = Array.prototype.newArray__Ljava_lang_Object_2ZLjava_lang_String_2I(false, '@3', @1);",
                          smapper.popI(), smapper.pushA(), typeName);
                     break;
                 }
@@ -966,27 +966,17 @@
                     i += 2;
                     String typeName = jc.getClassName(type);
                     int dim = readUByte(byteCodes, ++i);
-                    out.append("{ var a0 = new Array(").append(smapper.popI())
-                       .append(").initWith('").append(typeName).append("', null);");
-                    for (int d = 1; d < dim; d++) {
-                        typeName = typeName.substring(1);
-                        out.append("\n  var l" + d).append(" = ")
-                           .append(smapper.popI()).append(';');
-                        out.append("\n  for (var i" + d).append (" = 0; i" + d).
-                            append(" < a" + (d - 1)).
-                            append(".length; i" + d).append("++) {");
-                        out.append("\n    var a" + d).
-                            append (" = new Array(l" + d).append(").initWith('")
-                            .append(typeName).append("', ")
-                            .append(typeName.length() == 2 ? "0" : "null").append(");");
-                        out.append("\n    a" + (d - 1)).append("[i" + d).append("] = a" + d).
-                            append(";");
+                    StringBuilder dims = new StringBuilder();
+                    dims.append('[');
+                    for (int d = 0; d < dim; d++) {
+                        if (d != 0) {
+                            dims.append(",");
+                        }
+                        dims.append(smapper.popI());
                     }
-                    for (int d = 1; d < dim; d++) {
-                        out.append("\n  }");
-                    }
-                    out.append("\nvar ").append(smapper.pushA())
-                                        .append(" = a0; }");
+                    dims.append(']');
+                    emit(out, "var @2 = Array.prototype.multiNewArray__Ljava_lang_Object_2Ljava_lang_String_2_3II('@3', @1, 0);",
+                         dims.toString(), smapper.pushA(), typeName);
                     break;
                 }
                 case opc_arraylength:
@@ -1247,11 +1237,13 @@
                     int indx = readIntArg(byteCodes, i);
                     final String type = jc.getClassName(indx);
                     if (!type.startsWith("[")) {
-                        // no way to check arrays right now
-                        // XXX proper exception
                         emit(out,
                              "if (@1 !== null && !@1.$instOf_@2) throw {};",
                              smapper.getA(0), type.replace('/', '_'));
+                    } else {
+                        emit(out, "vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@2').cast__Ljava_lang_Object_2Ljava_lang_Object_2(@1);",
+                             smapper.getA(0), type
+                        );
                     }
                     i += 2;
                     break;
@@ -1259,9 +1251,16 @@
                 case opc_instanceof: {
                     int indx = readIntArg(byteCodes, i);
                     final String type = jc.getClassName(indx);
-                    emit(out, "var @2 = @1.$instOf_@3 ? 1 : 0;",
-                         smapper.popA(), smapper.pushI(),
-                         type.replace('/', '_'));
+                    if (!type.startsWith("[")) {
+                        emit(out, "var @2 = @1.$instOf_@3 ? 1 : 0;",
+                             smapper.popA(), smapper.pushI(),
+                             type.replace('/', '_'));
+                    } else {
+                        emit(out, "var @2 = vm.java_lang_Class(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('@3').isInstance__ZLjava_lang_Object_2(@1);",
+                            smapper.popA(), smapper.pushI(),
+                            type
+                        );
+                    }
                     i += 2;
                     break;
                 }
@@ -1567,8 +1566,12 @@
         String[] classRef = { null };
         String s = jc.stringValue(entryIndex, classRef);
         if (classRef[0] != null) {
-            addReference(classRef[0]);
-            s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";
+            if (classRef[0].startsWith("[")) {
+                s = accessClass("java_lang_Class") + "(false).forName__Ljava_lang_Class_2Ljava_lang_String_2('" + classRef[0] + "');";
+            } else {
+                addReference(classRef[0]);
+                s = accessClass(s.replace('/', '_')) + "(false).constructor.$class";
+            }
         }
         return s;
     }