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cashRegister
<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>
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