Create konami.js

piratebox/piratebox/www_content/js/konami.js

@@ -0,0 +1,54 @@
+/*
+ * Konami Code in Javascript
+ * Andreas Grech
+ * http://knowledge-aholic.blogspot.com/
+ *  v 1.1 (20091119)
+
+ Keycodes for the Konami Code
+ UP    : 38
+ DOWN  : 40
+ LEFT  : 37
+ RIGHT : 39
+ B     : 66
+ A     : 65
+*/
+
+var konamiCode = function (combination, callback) {
+    var lastCorrectInput = -1,
+        isActive = 0,
+        o = {};
+    if (typeof combination === "function") {
+        callback = combination;
+    }
+    if (Object.prototype.toString.call(combination) !== "[object Array]") {
+        combination = [38, 38, 40, 40, 37, 39, 37, 39, 66, 65];
+    }
+    o.start = function () {
+        if (isActive) {
+            return;
+        }
+        isActive = 1;
+        document.onkeyup = function (e) {
+            var code;
+            if (!isActive) {
+                return;
+            }
+            code = window.event ? window.event.keyCode : e.which;
+            if (combination[++lastCorrectInput] === code) {
+                if (lastCorrectInput === combination.length - 1) {
+                    if (callback && typeof(callback) === "function") {
+                        callback();
+                    }
+                }
+                return;
+            }
+            lastCorrectInput = -1;
+        };
+        return o;
+    };
+    o.stop = function () {
+        isActive = 0;
+        return o;
+    };
+    return o;
+};