1.工厂方式 定义通用类
function createObject(coord,elevation){
var obj = new Object();
obj.coord = coord;
obj.elevation = elevation;
obj.getCoord = function(){
return this.coord;
};
obj.getElevation = function(){
return this.elevation;
}
return obj;
}
var obj = new createObject();
2.构造函数方式
例:
function Car(sColor,iDoors,iMpg) {
this.color = sColor;
this.doors = iDoors;
this.mpg = iMpg;
this.showColor = function() {
alert(this.color);
};
}
var oCar1 = new Car("red",4,23);
var oCar2 = new Car("blue",3,25);
3.混合的构造函数/原型方式
function Car(sColor,iDoors,iMpg) {
this.color = sColor;
this.doors = iDoors;
this.mpg = iMpg;
this.drivers = new Array("Mike","John");
}
Car.prototype.showColor = function() {
alert(this.color);
};
var oCar1 = new Car("red",4,23);
var oCar2 = new Car("blue",3,25);
oCar1.drivers.push("Bill");
alert(oCar1.drivers); //输出 "Mike,John,Bill"
alert(oCar2.drivers); //输出 "Mike,John"