hodbby/gist:2930375

## gistfile1.js
<html>
  <head><title>cashRegister</title></head>
  <body>
    <script type="text/javascript">

	function StaffMember(name,discountPercent){
		this.name = name;
		this.discountPercent = discountPercent;
	}

	var sally = new StaffMember("Sally",5);
	var bob = new StaffMember("Bob",10);

	// Create yourself again as 'me' with a staff discount of 20%
	var me = new StaffMember ("hod",20);

	var cashRegister = {
		total:0,
		lastTransactionAmount: 0,
		add: function(itemCost){
			this.total += (itemCost || 0);
			this.lastTransactionAmount = itemCost;
			},

		scan: function(item,quantity){
			switch (item){
				case "eggs": this.add(0.98 * quantity); break;
				case "milk": this.add(1.23 * quantity); break;
				case "magazine": this.add(4.99 * quantity); break;
				case "chocolate": this.add(0.45 * quantity); break;
			}
			return true;
		},

		voidLastTranscation : function(){
			this.total -= this.lastTransactionAmount;
			this.lastTransactionAmount = 0;
		},

		// Create a new method applyStaffDiscount here
		applyStaffDiscount : function (employee) {
			this.total -= this.total * (employee.discountPercent / 100)
		}

	};

	cashRegister.scan('eggs',1);
	cashRegister.scan('milk',1);
	cashRegister.scan('magazine',3);
	// Apply your staff discount by passing the 'me' object
	// to applyStaffDiscount
	cashRegister.applyStaffDiscount (me);

	// Show the total bill with your discount
	document.write('Your bill is '+cashRegister.total.toFixed(2));
	</script>
  </body>
</html>
	<html>
	<head><title>cashRegister</title></head>
	<body>
	<script type="text/javascript">

	function StaffMember(name,discountPercent){
	this.name = name;
	this.discountPercent = discountPercent;
	}

	var sally = new StaffMember("Sally",5);
	var bob = new StaffMember("Bob",10);

	// Create yourself again as 'me' with a staff discount of 20%
	var me = new StaffMember ("hod",20);

	var cashRegister = {
	total:0,
	lastTransactionAmount: 0,
	add: function(itemCost){
	this.total += (itemCost \|\| 0);
	this.lastTransactionAmount = itemCost;
	},

	scan: function(item,quantity){
	switch (item){
	case "eggs": this.add(0.98 * quantity); break;
	case "milk": this.add(1.23 * quantity); break;
	case "magazine": this.add(4.99 * quantity); break;
	case "chocolate": this.add(0.45 * quantity); break;
	}
	return true;
	},

	voidLastTranscation : function(){
	this.total -= this.lastTransactionAmount;
	this.lastTransactionAmount = 0;
	},

	// Create a new method applyStaffDiscount here
	applyStaffDiscount : function (employee) {
	this.total -= this.total * (employee.discountPercent / 100)
	}

	};

	cashRegister.scan('eggs',1);
	cashRegister.scan('milk',1);
	cashRegister.scan('magazine',3);
	// Apply your staff discount by passing the 'me' object
	// to applyStaffDiscount
	cashRegister.applyStaffDiscount (me);

	// Show the total bill with your discount
	document.write('Your bill is '+cashRegister.total.toFixed(2));
	</script>
	</body>
	</html>