3 Ways to Extjs--09--javascript objects prototype the best way to set up a prototype

/** * JavaScript Object methods of 3 ways to  recommend the third operating efficiency is best */function P (name, age) {this.name = name; this.age = age;//First Method this.show = function () {alert (this.name);} This.doing = doing; }//Another method function doing () {alert (this.name);} The third method//javascript the prototype prototype  is shared by the instance object of all Classes p.prototype.dd = function () {alert (this.name);} var p1 = new P ("Mary", "//ext.msg.alert") var p2 = new P ("Rose"),//alert (P1.show () ==p2.show ());// Alert (p1.doing () ==p2.doing ()); alert (P1.DD () ==p2.dd ());

3 Ways to Extjs--09--javascript objects prototype the best way to set up a prototype