function Contact() 
{
	this.lastName;
	this.firstName;
	this.telephone;
	this.address;
	this.city;
	this.state;
	this.zip;
	this.getContacts = getContactInfo;
	this.updateContact = updateSelectedContact;
	
}
var contactCounter = 0;
var contactList = new Array();
var newContact = contactCounter;
contactList[newContact] = new Contact();

function addContact() 
{
	if (document.forms[3].lastname.value == "" || document.forms[3].firstname.value == "")
		window.alert("You must enter the contact's first and last names.");
	else 
	{
		if (document.forms[3].contacts.options[0].value == "contacts" || document.forms[3].contacts.options[0].value == null)
			document.forms[3].contacts.options[0] = null;
		var newContact = contactCounter;
		contactList[newContact] = new Contact();
		contactList[newContact].lastName = document.forms[3].lastname.value;
		contactList[newContact].firstName = document.forms[3].firstname.value;
		contactList[newContact].telephone = document.forms[3].telephone.value;
		contactList[newContact].address = document.forms[3].address.value;
		contactList[newContact].city = document.forms[3].city.value;
		contactList[newContact].state = document.forms[3].state.value;
		contactList[newContact].zip = document.forms[3].zip.value;
		var createContact = new Option();
		createContact.value = contactList[newContact].lastName + ", " + contactList[newContact].firstName;
		createContact.text = contactList[newContact].lastName + ", " + contactList[newContact].firstName;
		var numContacts = document.forms[3].contacts.options.length;
		document.forms[3].contacts.options[numContacts] = createContact;

		document.forms[3].lastname.value = "";
		document.forms[3].firstname.value = "";
		document.forms[3].telephone.value = "";
		document.forms[3].address.value = "";
		document.forms[3].city.value = "";
		document.forms[3].state.value = "";
		document.forms[3].zip.value = "";
		++contactCounter;
	}

	document.forms[3].userInfo.value = "--> Continue adding more contacts in the same way";
	document.forms[3].userInfo2.value = "--> To remove a contact, select from the list and press 'Delete Contact'";
	document.forms[3].userInfo3.value = "--> To retrieve information, select contact from the list";
	document.forms[3].userInfo4.value = "      >To update contact information, modify specific fields then press 'Update Contact'";
}

function getContactInfo() 
{

	if (document.forms[3].contacts.options[0].value == "contacts")
		window.alert("You must enter the contact's information first.");

	else
	{
		document.forms[3].lastname.value = this.lastName;
		document.forms[3].firstname.value = this.firstName;
		document.forms[3].telephone.value = this.telephone;
		document.forms[3].address.value = this.address;
		document.forms[3].city.value = this.city;
		document.forms[3].state.value = this.state;
		document.forms[3].zip.value = this.zip;
	}

}

function updateSelectedContact(curIndex) 
{
	this.lastName = document.forms[3].lastname.value;
	this.firstName = document.forms[3].firstname.value;
	this.telephone = document.forms[3].telephone.value;
	this.address = document.forms[3].address.value;
	this.city = document.forms[3].city.value;
	this.state = document.forms[3].state.value;
	this.zip = document.forms[3].zip.value;
	document.forms[3].contacts.options[curIndex].value = this.lastName + ", " + this.firstName;
	document.forms[3].contacts.options[curIndex].text = this.lastName + ", " + this.firstName;
	window.alert("Contact information updated.");
}

function deleteContact() 
{
	var selectedContact = 0;
	var contactSelected = false;
	while (selectedContact < document.forms[3].contacts.length) {
		if (document.forms[3].contacts.options[selectedContact].selected == true) {
			contactSelected = true;
			break;
		}
		++selectedContact;
	}
	if (contactSelected == true) {
		 document.forms[3].contacts.options[selectedContact] = null;
		 contactList.splice(selectedContact, 1);
	}
	else
		window.alert("You must select a contact in the list.");

	document.forms[3].lastname.value = "";
	document.forms[3].firstname.value = "";
	document.forms[3].telephone.value = "";
	document.forms[3].address.value = "";
	document.forms[3].city.value = "";
	document.forms[3].state.value = "";
	document.forms[3].zip.value = "";
	}

function newInput() {
	document.forms[3].lastname.focus();
	document.forms[3].lastname.value = "";
	document.forms[3].firstname.value = "";
	document.forms[3].telephone.value = "";
	document.forms[3].address.value = "";
	document.forms[3].city.value = "";
	document.forms[3].state.value = "";
	document.forms[3].zip.value = "";

	document.forms[3].userInfo.value = "--> After entering information press 'Add Contact'";

}