var student = new Object();
student.name = "Lanny";
student.age = "25";
student.location = "China";
var json = JSON.stringify(student);

var students = [];
students[students.length] = new Object();
students[students.length].name = "Lanny";
students[students.length].age = "25";
students[students.length].location = "China";
var json = JSON.stringify(students);

var student = new Object();
student.name = "Lanny";
student.age = "25";
student.location = "China";
students = (students || []).push(student);
var json = JSON.stringify(students);