diff -r 5186733b7e07 -r 752f48257d4a rt/vm/src/main/java/org/apidesign/vm4brwsr/VM.java
--- a/rt/vm/src/main/java/org/apidesign/vm4brwsr/VM.java	Wed May 28 09:07:48 2014 +0200
+++ b/rt/vm/src/main/java/org/apidesign/vm4brwsr/VM.java	Wed May 28 10:47:18 2014 +0200
@@ -493,14 +493,28 @@
                 + "    var at = pending.indexOf(ev.target);\n"
                 + "    pending.splice(at, 1);\n"
                 + "    if (pending.length === 0) {\n"
-                + "      for (var i = 0; i < pendingClasses.length; i += 2) {\n"
-                + "        var vm = pendingClasses[i];\n"
-                + "        var n = pendingClasses[i + 1];\n"
-                + "        vm.loadClass(n);\n"
+                + "      for (var i = 0; i < pendingClasses.length; i += 3) {\n"
+                + "        invokeMethod(pendingClasses[i], pendingClasses[i + 1], pendingClasses[i + 2]);\n"
                 + "      }\n"
                 + "      pendingClasses = [];\n"
                 + "    }\n"
                 + "  }\n"
+                + "  function invokeMethod(vm, n, args) {\n"
+                + "    var clazz = vm.loadClass(n);\n"
+                + "    if (args) {\n"
+                + "      var seek = args[0];\n"
+                + "      var prefix = seek.indexOf('__') == -1 ? seek + '__' : seek;\n"
+                + "      args = Array.prototype.slice.call(args, 1);\n"
+                + "      var found = '';\n"
+                + "      for (var m in clazz) {\n"
+                + "        if (m.indexOf(prefix) === 0) {\n"
+                + "          return clazz[m].apply(null, args);\n"
+                + "        }\n"
+                + "        found += m.toString() + '\\n'\n"
+                + "      }\n"
+                + "      throw 'Cannot find ' + seek + ' in ' + n + ' found:\\n' + found;\n"
+                + "    }\n"
+                + "  }\n"
                 + "  function extensionError(ev) {\n"
                 + "    console.log('error loading ' + ev.target.src);\n"
                 + "    extensionLoaded(ev);\n"
@@ -611,14 +625,29 @@
                 + "    loader.loadClass = function(name) {\n"
                 + "      if (pending.length === 0) {\n"
                 + "        try {\n"
-                + "          return loadClass(name);\n"
+                + "          var c = loadClass(name);\n"
+                + "          c['invoke'] = function() {\n"
+                + "            return invokeMethod(vm, name, arguments);\n"
+                + "          };\n"
+                + "          return c;\n"
                 + "        } catch (err) {\n"
                 + "          if (pending.length === 0) throw err;\n"
                 + "        }\n"
                 + "      }\n"
                 + "      pendingClasses.push(vm);\n"
                 + "      pendingClasses.push(name);\n"
-                + "      return null;\n"
+                + "      pendingClasses.push(null);\n"
+                + "      return {\n"
+                + "        'invoke' : function() {\n"
+                + "          if (pending.length === 0) {\n"
+                + "            invokeMethod(vm, name, arguments);\n"
+                + "            return;\n"
+                + "          }\n"
+                + "          pendingClasses.push(vm);\n"
+                + "          pendingClasses.push(name);\n"
+                + "          pendingClasses.push(arguments);\n"
+                + "        }\n"
+                + "      };\n"
                 + "    }\n"
                 + "    return loader;\n"
                 + "  };\n");