new file mode 100644
--- /dev/null
+++ b/polyfill.js
@@ -0,0 +1,24 @@
+//js-core doesn't support bind, polyill taken from https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/bind
+if (!Function.prototype.bind) {  
+  Function.prototype.bind = function (oThis) {  
+    if (typeof this !== "function") {  
+      // closest thing possible to the ECMAScript 5 internal IsCallable function  
+      throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable");  
+    }  
+  
+    var aArgs = Array.prototype.slice.call(arguments, 1),   
+        fToBind = this,   
+        fNOP = function () {},  
+        fBound = function () {  
+          return fToBind.apply(this instanceof fNOP  
+                                 ? this  
+                                 : oThis || window,  
+                               aArgs.concat(Array.prototype.slice.call(arguments)));  
+        };  
+  
+    fNOP.prototype = this.prototype;  
+    fBound.prototype = new fNOP();  
+  
+    return fBound;  
+  };  
+}