add Array.prototype.lastIndexOf

source/Ox/js/Fallback.js

@@ -58,6 +58,26 @@ if (!Array.prototype.indexOf) {
     };
 }
 
+// see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/lastIndexOf
+if (!Array.prototype.lastIndexOf) {  
+    Array.prototype.lastIndexOf = function(val) {  
+        if (this === void 0 || this === null) {  
+            throw new TypeError();  
+        }  
+        var arr = Object(this),
+            i,
+            len = arr.length >>> 0,
+            ret = -1;
+        for (i = len - 1; i >= 0; i--) {
+            if (i in arr && arr[i] === val) {
+                ret = val;
+                break;
+            }
+        }
+        return ret;
+    };
+}
+
 // see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/map
 if (!Array.prototype.map) {
     Array.prototype.map = function(fn, that) {