foreach method (compatible with all browsers)

-I extend a myforeach on the prototype of the built-in class to handle the problem of foreach incompatibility
CallBack: A callback function that iterates through an item in an array to perform a callBack
Context: Change the this point in the callback method

Array.prototype.myForEach = function Myforeach (callBack, context) {
typeof context = = = = "undefined"? context = Window:null;

if ("ForEach" in Array.prototype) {
This.foreach (callBack, context);
return;
    }

//-> Incompatible Processing
For (var i = 0; i < this.length; i++) {
typeof CallBack = = = "function"? Callback.call (context, this[i], I, this): null;
    }
};

foreach method (compatible with all browsers)