if(typeof Array.prototype.each != 'function'){
			Array.prototype.each = function(callback, context){
				if(this.length > 0 && typeof callback == 'function'){
					for(var i = 0; i < this.length; i++){
						callback.call(context || window, this[i]);
					}
				}
			}
		}

This function is add 'each' function to the javascript Array object.

Array.each function

javascript, array

JavaScript