diff --git a/lib/std.js b/lib/std.js
index 8365217..57f6eaa 100644
--- a/lib/std.js
+++ b/lib/std.js
@@ -106,7 +106,7 @@ function repeat(target, callback, onError) {
             var ms = target;
 
             var i = 0;
-			var n = 0;
+            var result = null;
             var handler = null;
             var cur = Date.now();
             var end = cur + ms;
@@ -115,14 +115,18 @@ function repeat(target, callback, onError) {
                 while (ms === true ? true : (cur < end)) {
                     try {
                         if (typeof callback === "function")
-                            var n = callback(i);
-                            if (typeof n === "number")
-                                i += n
-                            ;
+                            var result = callback(i);
+                            if (typeof result === "number") {
+                                i += result;
+                            } else if (result === false) {
+                                break;
+                            }
                         ;
                     } catch (e) {
                         if (typeof onError === "function")
-                            onError(e)
+                            if (onError(e) === false)
+                                break
+                            ;
                         ;
                     }
                     cur = Date.now();
@@ -141,11 +145,15 @@ function repeat(target, callback, onError) {
             for (var i = 0; i < arr.length; i++) {
                 try {
                     if (typeof callback === "function")
-                        callback(i, arr[i])
+                        if (callback(i, arr[i]) === false)
+                            break
+                        ;
                     ;
                 } catch (e) {
                     if (typeof onError === "function")
-                        onError(e)
+                        if (onError(e) === false)
+                            break
+                        ;
                     ;
                 }
             }