摘要： 5. 动态原型方法function Car(sColor, iDoors, iMpg) {this.color = sColor;this.doors = iDoors;this.mpg = iMpg;this.drivers = new Array("Mike", "Sue");if (typeof Car._initialized == "undefined") {Car.prototype.showColor = function() {alert(this.color);};Car._initialized = true;}} 阅读全文