1 function Person(name, age) { 2     this.name = name; 3     this.age = age; 4     this.eat = function() { 5         alert("eating..."); 6     } 7 } 8 var p1 = new Person("cai10", 21); 9 var p2 = new Person("cai20", 27);10 alert(p1.name);                 // cai1011 alert(p1.age);                  // 2112 p1.eat();                       // eating...13 alert(typeof p1);               // object14 alert(p1 instanceof Object);    // true15 alert(p1 instanceof Person);    // true16 alert(p1.constructor);          // function Person(name, age) {...}17 alert(p1.eat == p2.eat);        // false