Basic Prototype Example With Accounts

accounts.js

function Account(balance) {
	this.balance = balance || 0;
}

Account.prototype.deposit = function(amount) {
	this.balance += amount;
};

Account.prototype.withdraw = function(amount) {
	this.balance -= amount;
};

Account.prototype.getbalance = function() {
	console.log('You have ' + this.balance + ' in your account');
}

console.log('First Account');
var account = new Account(0);
account.getbalance();
account.deposit(1200);
account.getbalance();
account.withdraw(200);
account.getbalance();

console.log('Second Account');
var secondAccount = new Account(1000);
secondAccount.deposit(1200);
secondAccount.getbalance();