Understanding new in Java script vs bind

new_vs_bind.js

function Customer(name, age)
{
	this.name = name;
	this.age = age;
}

var dave = new Customer("Dave", 35)
Dump(dave);

var jax = {};
Customer.bind(jax, "Jax", 29)();
Dump(jax);

function Dump(customer)
{
	alert(customer.name);
	alert(customer.age);1
}