Jsのプロトタイプチェーンの継承、構造関数の継承、組合せの継承

	// -----------------------------------------     
	//   1：      ，           。
	//   2：                 ,              ;
		function Dad(name,age){
			this.name = name;
			this.age = age;
			this.counts = [1,2,3,4,5];
		}
		Dad.prototype.sayNmae = function() {
			console.log(this.name)
		};
		function Son(name,age){
			this.name = name;
			this.age = age;
		};
		Son.prototype = new Dad();
		var son = new Son('  ',23);
		var dad = new Dad('  ',88);
		son.sayNmae();
		son.counts.push(6)	//    counts
		var son1 = new Son('  ',11);
		console.log(son1.counts)//        counts    ，  1
		console.log(son.counts)
		console.log(son instanceof Dad);
		console.log(dad instanceof Dad);
		console.log(dad instanceof Son);
		//             ,isPrototypeOf()       true,     .
		console.log(Object.prototype.isPrototypeOf(son));
		console.log(Dad.prototype.isPrototypeOf(son));
		console.log(Son.prototype.isPrototypeOf(son));
		// -----------------------------------------      。
		//     :                     .
		//   1.               ,         ;
		//   2.               
		//   1.           ,             。
		//   2.                   。
		function Person(name,age){
			this.name = name;
			this.age = age;
			this.counts = [1,2,3,4,5];
		}
		function Man(name,age,sex){
			Person.call(this,name,age);
			this.sex = sex;
		}
		var man = new Man('  ',18,' ');
		var man1 = new Man('   ',19,' ')
		man.counts.push(6)
		console.log(man);//counts 1 6
		console.log(man1);//counts 1 5
		// -------------------------------------------                    
		//   1.                    ,        ,   JavaScript          .   , instanceof   isPrototypeOf( )                 .
		//   1.               ，         
		
		function Teacher(name,age){
			this.name = name;
			this.age = age;
		}
		Teacher.prototype.sayNmae = function(){
			console.log(this.name)
		}
		function Student(name,age,sex){
			Teacher.call(this,name,age);
			this.sex = sex;
		}
		Student.prototype = new Teacher();
		var student = new Student('liuchanh',18,'boy');
		student.__proto__.name = '  ';
		console.log(student)