function Person(name, profession) {
this.name = name; this.profession = profession; this.speak = function () { document.writeln("我叫"+name+",我是一位"+profession); } }function Student(name,profession) {
Person.call(this,name,profession); };function Teacher(name, profession)
{ Person.apply(this, arguments); }var student = new Student("张三", "学生");
var teacher = new Teacher("李四", "老师");student.speak();
teacher.speak();结果如下
从结果中我们可以看到,apply和call可以实现继承,但call的用法要比apply灵活