Added in Array.prototype.indexOf es5 shim.

static/script/devices/sanitisers/whitelisted.js

@@ -24,7 +24,10 @@
  * Please contact us for an alternative licence
  */
  require.def('antie/devices/sanitisers/whitelisted',
-    ['antie/devices/sanitiser'],
+    [
+      'antie/devices/sanitiser',
+      'antie/lib/array.indexof' // Adds Array.prototype.indexOf()
+    ],
     function (Sanitiser) {
 
     'use strict';

static/script/events/event.js

@@ -35,7 +35,11 @@
  */
 
 require.def('antie/events/event',
-	['antie/class', 'antie/runtimecontext'],
+	[
+		'antie/class',
+		'antie/runtimecontext',
+		'antie/lib/array.indexof' // Adds Array.prototype.indexOf()
+	],
 	function(Class, RuntimeContext) {
 		'use strict';
 

static/script/lib/array.indexof.js

@@ -0,0 +1,72 @@
+require.def('antie/lib/array.indexof', function() {
+
+  // From: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/indexOf
+  // License: CC-BY-SA 2.5. http://creativecommons.org/licenses/by-sa/2.5/
+  // Changes: No changes from original
+
+  // Production steps of ECMA-262, Edition 5, 15.4.4.14
+  // Reference: http://es5.github.io/#x15.4.4.14
+  if (!Array.prototype.indexOf) {
+    Array.prototype.indexOf = function(searchElement, fromIndex) {
+
+      var k;
+
+      // 1. Let O be the result of calling ToObject passing
+      //    the this value as the argument.
+      if (this == null) {
+        throw new TypeError('"this" is null or not defined');
+      }
+
+      var O = Object(this);
+
+      // 2. Let lenValue be the result of calling the Get
+      //    internal method of O with the argument "length".
+      // 3. Let len be ToUint32(lenValue).
+      var len = O.length >>> 0;
+
+      // 4. If len is 0, return -1.
+      if (len === 0) {
+        return -1;
+      }
+
+      // 5. If argument fromIndex was passed let n be
+      //    ToInteger(fromIndex); else let n be 0.
+      var n = +fromIndex || 0;
+
+      if (Math.abs(n) === Infinity) {
+        n = 0;
+      }
+
+      // 6. If n >= len, return -1.
+      if (n >= len) {
+        return -1;
+      }
+
+      // 7. If n >= 0, then Let k be n.
+      // 8. Else, n<0, Let k be len - abs(n).
+      //    If k is less than 0, then let k be 0.
+      k = Math.max(n >= 0 ? n : len - Math.abs(n), 0);
+
+      // 9. Repeat, while k < len
+      while (k < len) {
+        // a. Let Pk be ToString(k).
+        //   This is implicit for LHS operands of the in operator
+        // b. Let kPresent be the result of calling the
+        //    HasProperty internal method of O with argument Pk.
+        //   This step can be combined with c
+        // c. If kPresent is true, then
+        //    i.  Let elementK be the result of calling the Get
+        //        internal method of O with the argument ToString(k).
+        //   ii.  Let same be the result of applying the
+        //        Strict Equality Comparison Algorithm to
+        //        searchElement and elementK.
+        //  iii.  If same is true, return k.
+        if (k in O && O[k] === searchElement) {
+          return k;
+        }
+        k++;
+      }
+      return -1;
+    };
+  }
+});

static/script/widgets/widget.js

@@ -33,7 +33,8 @@
 require.def('antie/widgets/widget',
     [
         'antie/class',
-        'antie/runtimecontext'
+        'antie/runtimecontext',
+        'antie/lib/array.indexof' // Adds Array.prototype.indexOf()
     ],
     function(Class, RuntimeContext) {
         'use strict';