//原型鏈中屬性的查詢
		function Person(name,color){
			this.name=name;
			this.color=color;
		}
		function Teacher(name,age){
			this.name=name;
			this.age=age;
		}
		//實現繼承
		Teacher.prototype=new Person();
		Teacher.prototype.book="書本";
		var t1=new Teacher("aa",32);
		//查詢屬性
		//1.當Teacher中含有name屬性，不管有沒有賦值都表明在Teacher中含有name屬性
		console.log(t1.name);
 

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