HTML Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>My first website!</title>
    <script type="text/javascript" src="JScript.js"></script>
</head>
<body>
<script type="text/javascript">
Code JavaScript:
//The "MovieTickets" constructor's properties will be used to add on an HTML table to retrieve info. The constructor will automatically be initialzed when a prototype of a different constructor is called.
function MovieTickets(productId, customerName, film, showings) {
 
    this.productId = productId;
    this.customerName = customerName;
    this.film = film;
    this.showings = showings;
 
}
 
//The prototype's method will be used to return the properties to display on the HTML table.
MovieTickets.prototype.getProductId = function () { return this.productId; };
MovieTickets.prototype.getCustomerName = function () { return this.customerName; };
MovieTickets.prototype.getFilm = function () { return this.film; };
MovieTickets.prototype.getShowings = function () { return this.showings; };
 
//The "booking" property is added to have it's array element to automatically create an "MovieTickets" instance.
function bookingSummary() { this.booking = []; };
 
/*The "ticketInfo" method will be used for it's arguments to automatically be copied into the "MovieTickets" constructor arguments. Once the    "productId" is used, the "booking" property's array will create a new "MovieTickets" instance object, which it's arguments will be            automatically copied from the "ticketInfo" method.  
*/
bookingSummary.prototype.ticketInfo = function (productId, customerName, film, showings) {
 
/* Once the "productId" is used, the "booking" property's array element will create a "MovieTickets" instance, which it's arguments are copied   from the "ticketInfo" method to display the "MovieTickets" methods to display on the HTML table.
*/
    this.booking[productId] = new MovieTickets(productId, customerName, film, showings);
 
}
 
/* Create an HTML table method that's used from the "booking" property's array element that will be used to retrieve the "MovieTickets"    methods from it's prototype.
 
The "getHTMLTable" method will be called after the "ticketInfo" method is invoked.
*/
bookingSummary.prototype.getHTMLTable = function () {
 
    var htmlTable = '<table border=1>',
        table,
        movie = this.booking;
 
    //Enumerate the data to create a table that's based on the methods from the "MovieTicket's" method.
    for (table in movie) {
 
        htmlTable += '<tr><th>';
        htmlTable += 'ProductId';
        htmlTable += '</th>';
 
        htmlTable += '<th>'
        htmlTable += 'Customer Name';
        htmlTable += '</th>';
 
        htmlTable += '<th>';
        htmlTable += 'Film';
        htmlTable += '</th>';
 
        htmlTable += '<th>';
        htmlTable += 'Showings';
        htmlTable += '</th></tr>';
 
        htmlTable += '<tr><td>';
        htmlTable += movie[table].getProductId();
        htmlTable += '</td>';
 
        htmlTable += '<td>';
        htmlTable += movie[table].getCustomerName();
        htmlTable += '</td>'
 
        htmlTable += '<td>';
        htmlTable += movie[table].getFilm();
        htmlTable += '</td>';
 
        htmlTable += '<td>';
        htmlTable += movie[table].getShowings();
        htmlTable += '</td></tr>';
    }
 
    htmlTable += '</table>';
    return htmlTable;
}
 
var ticketInfo1 = new bookingSummary();
ticketInfo1.ticketInfo(7283, 'John Doe', 'The Dark Knight Rises', '18 Wed July 2012');
ticketInfo1.ticketInfo(7149, 'Mary Jay', 'The Avengers', '5 May Friday 2012');
 
//Display in HTML.
document.write(ticketInfo1.getHTMLTable());
HTML Code:
</script>
</body>
</html>
Hi you guys. I have a quick question about trying to use the for loop to loop around "movie". When I try to execute it in the page, it doesn't work. But instead I'm using the for-in loop to loop around the "movie array" and of course it works well as expected. It's been said using the for loop is the better approach when looping through the array, because it lead to logical errors especially when you're using the Array.prototype. But why is it that the for loop doesn't work?

I apologize for the long comments in my coding it's not structured properly the way I wanted it, due to cut and paste. You don't need to read all of that.

Thanks.