Note:
代码来自于亚马逊Ajax中.
function Vehicle() {
var wheelCount = 4;
var curbWeightInPounds = 4000;
this.getWheelCount = function() {
return wheelCount;
}
this.setWheelCount = function(count) {
wheelCount = count;
}
this.getCurbWeightInPounds = function() {
return curbWeightInPounds;
}
this.setCurbWeightInPounds = function(weight) {
curbWeightInPounds = weight;
}
this.refuel = function() {
return "Refueling Vehicle with regular 87 octane gasoline";
}
this.mainTasks = function() {
return "Driving to work, school, and the grocery store";
}
}
function SportsCar() {
this.refuel = function() {
return "Refueling SportsCar with premium 94 octane gasoline";
}
this.mainTasks = function() {
return "Spirited driving, looking good, driving to the beach";
}
}
function CementTruck() {
this.refuel = function() {
return "Refueling CementTruck with diesel fuel";
}
this.mainTasks = function() {
return "Arrive at construction site, extend boom, deliver cement";
}
}
function createInheritance(parent, child) {
var property;
for(property in parent) {
if(!child[property]) {
child[property] = parent[property];
}
}
}
function describe(vehicle) {
var description = "";
description = description + "Number of wheels (via property): "
+ vehicle.wheelCount;
description = description + "\n\nNumber of wheels (via accessor): "
+ vehicle.getWheelCount();
description = description + "\n\nCurb Weight (via property): "
+ vehicle.curbWeightInPounds;
description = description + "\n\nCurb Weight (via accessor): "
+ vehicle.getCurbWeightInPounds();
description = description + "\n\nRefueling Method: " + vehicle.refuel();
description = description + "\n\nMain Tasks: " + vehicle.mainTasks();
alert(description);
}
function createVehicle() {
var vehicle = new Vehicle();
describe(vehicle);
}
function createSportsCar() {
var sportsCar = new SportsCar();
createInheritance(new Vehicle(), sportsCar);
sportsCar.setCurbWeightInPounds(3000);
describe(sportsCar);
}
function createCementTruck() {
var cementTruck = new CementTruck();
createInheritance(new Vehicle(), cementTruck);
cementTruck.setWheelCount(10);
cementTruck.setCurbWeightInPounds(10000);
describe(cementTruck);
}
posted @ 2008-06-23 13:34
Robot·H 阅读(161)
评论(0) 编辑 收藏 网摘 所属分类:
CSS+Javacript