diff --git a/core/js/compatibility.js b/core/js/compatibility.js
index 0cfeefab87..cc37949409 100644
--- a/core/js/compatibility.js
+++ b/core/js/compatibility.js
@@ -1,3 +1,107 @@
+/**
+ * implement Object.create for browsers without native support
+ */
+if (typeof Object.create !== 'function') {
+	Object.create = function (o) {
+		function F() {}
+		F.prototype = o;
+		return new F();
+	};
+}
+
+/**
+ * implement Object.keys for browsers without native support
+ */
+if (typeof Object.keys !== 'function') {
+	Object.keys = function(o) {
+		if (o !== Object(o)) {
+			throw new TypeError('Object.keys called on a non-object');
+		}
+		var k=[],p;
+		for (p in o) {
+			if (Object.prototype.hasOwnProperty.call(o,p)) {
+				k.push(p);
+			}
+		}
+		return k;
+	}
+}
+
+/**
+ * implement Array.filter for browsers without native support
+ */
+if (!Array.prototype.filter) {
+	Array.prototype.filter = function(fun /*, thisp*/) {
+		var len = this.length >>> 0;
+		if (typeof fun !== "function"){
+			throw new TypeError();
+		}
+
+		var res = [];
+		var thisp = arguments[1];
+		for (var i = 0; i < len; i++) {
+			if (i in this) {
+				var val = this[i]; // in case fun mutates this
+				if (fun.call(thisp, val, i, this))
+					res.push(val);
+			}
+		}
+		return res;
+	};
+}
+
+/**
+ * implement Array.indexOf for browsers without native support
+ */
+if (!Array.prototype.indexOf){
+	Array.prototype.indexOf = function(elt /*, from*/)
+	{
+		var len = this.length;
+
+		var from = Number(arguments[1]) || 0;
+		from = (from < 0) ? Math.ceil(from) : Math.floor(from);
+		if (from < 0){
+			from += len;
+		}
+
+		for (; from < len; from++)
+		{
+			if (from in this && this[from] === elt){
+				return from;
+			}
+		}
+		return -1;
+	};
+}
+
+/**
+ * implement Array.map for browsers without native support
+ */
+if (!Array.prototype.map){
+	Array.prototype.map = function(fun /*, thisp */){
+		"use strict";
+
+		if (this === void 0 || this === null){
+			throw new TypeError();
+		}
+
+		var t = Object(this);
+		var len = t.length >>> 0;
+		if (typeof fun !== "function"){
+			throw new TypeError();
+		}
+
+		var res = new Array(len);
+		var thisp = arguments[1];
+		for (var i = 0; i < len; i++){
+			if (i in t){
+				res[i] = fun.call(thisp, t[i], i, t);
+			}
+		}
+
+		return res;
+	};
+}
 
 //https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Global_Objects/Function/bind
 if (!Function.prototype.bind) {
diff --git a/core/js/js.js b/core/js/js.js
index b237c6fcf5..e1fbd04a8d 100644
--- a/core/js/js.js
+++ b/core/js/js.js
@@ -439,52 +439,6 @@ if(typeof localStorage !=='undefined' && localStorage !== null){
 	};
 }
 
-/**
- * implement Array.filter for browsers without native support
- */
-if (!Array.prototype.filter) {
-	Array.prototype.filter = function(fun /*, thisp*/) {
-		var len = this.length >>> 0;
-		if (typeof fun !== "function"){
-			throw new TypeError();
-		}
-
-		var res = [];
-		var thisp = arguments[1];
-		for (var i = 0; i < len; i++) {
-			if (i in this) {
-				var val = this[i]; // in case fun mutates this
-				if (fun.call(thisp, val, i, this))
-					res.push(val);
-			}
-		}
-		return res;
-	};
-}
-/**
- * implement Array.indexOf for browsers without native support
- */
-if (!Array.prototype.indexOf){
-	Array.prototype.indexOf = function(elt /*, from*/)
-	{
-		var len = this.length;
-
-		var from = Number(arguments[1]) || 0;
-		from = (from < 0) ? Math.ceil(from) : Math.floor(from);
-		if (from < 0){
-			from += len;
-		}
-
-		for (; from < len; from++)
-		{
-			if (from in this && this[from] === elt){
-				return from;
-			}
-		}
-		return -1;
-	};
-}
-
 /**
  * check if the browser support svg images
  */
@@ -704,32 +658,6 @@ $(document).ready(function(){
 	});
 });
 
-if (!Array.prototype.map){
-	Array.prototype.map = function(fun /*, thisp */){
-		"use strict";
-
-		if (this === void 0 || this === null){
-			throw new TypeError();
-		}
-
-		var t = Object(this);
-		var len = t.length >>> 0;
-		if (typeof fun !== "function"){
-			throw new TypeError();
-		}
-
-		var res = new Array(len);
-		var thisp = arguments[1];
-		for (var i = 0; i < len; i++){
-			if (i in t){
-				res[i] = fun.call(thisp, t[i], i, t);
-			}
-		}
-
-		return res;
-	};
-}
-
 /**
  * Filter Jquery selector by attribute value
  */