diff --git a/lib/std.js b/lib/std.js
index d4c5603..0bbfcf0 100644
--- a/lib/std.js
+++ b/lib/std.js
@@ -66,12 +66,12 @@ if (!Enumerator.prototype.toArray) {
 // Global APIs
 /////////////////////////////////////////////////////////////////////////////////
 
-global.GetResource = function(ResourceName) {
+function GetResource(ResourceName) {
     return arguments.callee.caller.GetResource(ResourceName);
 }
 
 // [lib/std] the time of `sleep()' function is not accuracy #34
-global.sleep = function(ms, callback) {
+function sleep(ms, callback) {
     var handler = null;
 
     var cur = Date.now();
@@ -99,32 +99,78 @@ global.sleep = function(ms, callback) {
     return { 'ms': end, 'handler': handler };
 };
 
-global.doRepeat = function(ms, callback, error) {
-    var handler = null;
+function repeat(target, callback, onError) {
+    switch (typeof target) {
+        case "number":
+		case "boolean":
+            var ms = target;
+            var handler = null;
+            var cur = Date.now();
+            var end = cur + ms;
 
-    var cur = Date.now();
-    var end = cur + ms;
-
-    if (typeof WScript !== "undefined") {
-        while (ms === true ? true : (cur < end)) {
-            try {
-                sleep(callback());
-            } catch (e) {
-                error(e);
+            if (typeof WScript !== "undefined") {
+                while (ms === true ? true : (cur < end)) {
+                    try {
+                        if (typeof callback === "function")
+                            callback(cur)
+                        ;
+                    } catch (e) {
+                        if (typeof onError === "function")
+                            onError(e)
+                        ;
+                    }
+                    cur = Date.now();
+                }
+                end = Date.now();
+            } else if (typeof window !== "undefined") {
+                if (typeof callback === "function")
+                    handler = setInterval(callback, ms);
+                ;
             }
-            cur = Date.now();
-        }
-        end = Date.now();
-    } else if (typeof window !== "undefined") {
-        if (typeof callback === "function")
-            handler = setInterval(callback, ms);
-        ;
-    }
 
-    return { 'ms': end, 'handler': handler };
+            return { 'ms': end, 'handler': handler };
+
+        case "object":
+            var arr = target;
+            for (var i = 0; i < arr.length; i++) {
+                try {
+                    if (typeof callback === "function")
+                        callback(i, arr[i])
+                    ;
+                } catch (e) {
+                    if (typeof onError === "function")
+                        onError(e)
+                    ;
+                }
+            }
+            break;
+    }
 };
 
-global.range = function() {
+function rotate(target, callback, onError) {
+    var arr = target;
+    var i = 0;
+    var stop = false;
+
+    while (!stop) {
+        try {
+            if (typeof callback === "function") {
+                stop = callback(i, arr[i]);
+            } else {
+                stop = true;
+            }
+        } catch (e) {
+            if (typeof onError === "function")
+                stop = onError(e);
+            ;
+        }
+
+        i++;
+        i = i % keywords.length;
+    }
+};
+
+function range() {
     var args = arguments;
     var N = [], start, end, step;
 
@@ -155,7 +201,7 @@ global.range = function() {
     return N;
 };
 
-global.CHR = function(ord) {
+function CHR(ord) {
     return String.fromCharCode(ord);
 };
 
@@ -167,7 +213,7 @@ global.CHR = function(ord) {
 // Emulate Server.CreateObject
 /////////////////////////////////////////////////////////////////////////////////
 
-exports.CreateObject = function(progId, serverName, callback) {
+function CreateObject(progId, serverName, callback) {
     var progIds = [];
     var _CreateObject = function(p, s) {
         if (typeof(WScript) !== "undefined") {
@@ -196,42 +242,22 @@ exports.CreateObject = function(progId, serverName, callback) {
     }
 };
 
+/////////////////////////////////////////////////////////////////////////////////
+// Standard Event Object
 /////////////////////////////////////////////////////////////////////////////////
 
-var StdEvent = function(eventName) {
-    this.bubbles = false;   // Not supported
-    this.cancelable = false;   // Not supported
-    this.composed = false;   // Not supported
-    this.currentTarget = null;   // Not supported
+function StdEvent(eventName) {
     this.defaultPrevented = false;
-    this.eventPhase = null;   // TODO
-    this.isTrusted = true;   // Not supported
     this.timeStamp = new Date();
-
     this.eventName = eventName;
     this.target = null;
 
-    // Not supported
-    this.composedPath = function() {
-        return null;   
-    };
-
     this.preventDefault = function() {
         this.defaultPrevented = true;
     };
-
-    // Not supported
-    this.stopImmediatePropagation = function() {
-        return null;   
-    };
-
-    // Not supported
-    this.setPropagation = function() {
-        return null;   
-    };
 };
 
-var StdEventableObject = function() {
+function StdEventableObject() {
     this.dispatchEvent = function(event) {
         event.target = this;
         if(('on' + event.eventName) in this) this['on' + event.eventName](event);
@@ -246,6 +272,13 @@ var StdEventableObject = function() {
     };
 };
 
+global.GetResource = GetResource;
+global.sleep = sleep;
+global.repeat = repeat;
+global.rotate = rotate;
+global.range = range;
+global.CHR = CHR;
+
 exports.VERSIONINFO = "Standard Lib (std.js) version 0.4";
 exports.global = global;
 exports.require = global.require;