A graceful JS code

<!--———————————————— JS prototype (prototype) ————————————————————-->
//implement array each (loop array for each item)
var arr=[1,3,4,2];
Arr.foreach (function (item,index,array) {
//alert (item);
});
var arr2=[1,3,23,[12,[13,[45]];
array.prototype.each=function (FN) {
//destination iterates over each item of an array
try{
//Counter records the position of the currently traversed element
this.i| | (this.i=0);
//Judge when to enter
if (this.length>0&&fn.constructor==function) {
//Iterate through each item of the array
While (this.i<this.length) {
//Get an array of each item
var e=this[this.i];
//Judgment element exists and is an array
if (e&&e.constructor==array) {
E.each (FN);
}else{
//How to use bindings
//fn.apply (E,[e]);
Fn.call (e,e);
}
this.i++;
}
this.i=null;//free Memory
}
}catch (ex) {
}
}
Arr2.each (function (item) {alert (item);});

A graceful JS code