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/*
JavaScript Unleashed, Third Edition
by Richard Wagner and R. Allen Wyke
ISBN: 067231763X
Publisher Sams CopyRight 2000
*/
<html>
<head>
<title>Using the book object</title>
<script type="text/javascript">
<!--
function book(title, author, ISBN, subject, rating) {
this.title = title;
this.author = author;
this.ISBN = ISBN;
this.subject = subject;
this.rating = rating;
this.show = show;
}
function show() { objWindow = window.open("", "", "width=600,height=300");
objWindow.document.write("<html><body >");
objWindow.document.write("<h1>Object Description</h1>");
objWindow.document.write("<p>");
objWindow.document.write("Book Title: " + this.title + "<br>");
objWindow.document.write("Author: " + this.author + "<br>");
objWindow.document.write("ISBN: " + this.ISBN + "<br>");
objWindow.document.write("Subject: " + this.subject + "<br>");
objWindow.document.write("Allen's Rating: " + this.rating + "<br>");
objWindow.document.write("</body ></html>");
objWindow.document.close();
}
function assignRating() {
selectedBook = document.form1.bookList.options[document.form1.bookList.selectedIndex].value;
selectedBook = eval(selectedBook);
selectedBook.rating = document.form1.rating.options[document.form1.rating.selectedIndex].text;
}
function showBook() {
selectedBook = document.form1.bookList.options[document.form1.bookList.selectedIndex].value;
selectedBook = eval(selectedBook);
selectedBook.show();
}
// Execute on loading
dbBook = new book("Cost of Discipleship", "Dietrich Bonhoeffer","1-57521-118-1", "Grace", 5);
fkBook = new book("The Once and Future King", "T.H. White","1-57521-112-1", "Camelot", 5);
olBook = new book("On Liberty", "John Stuart Mill","1-53221-118-1", "Political Philosophy", 4);
iaBook = new book("Icarus Agenda", "Robert Ludlum","1-53221-118-1", "Political Thriller", 3);
cnBook = new book("Chronicles of Narnia", "C.S. Lewis","1-53231-128-1", "Children's Fiction", 5);
//-->
</script>
</head><body>
<h1>Book Objects</h1>
<form name="form1">
<p>
Select a book:
</p>
<p>
<select name="bookList" size=1>
<option value="dbBook">Cost of Discipleship</option>
<option value="fkBook">The Once and Future King</option>
<option value="olBook">On Liberty</option>
<option value="iaBook">Icarus Agenda</option>
<option value="cnBook">Chronicles of Narnia</option>
</select>
</p>
<p>
Assign a rating:
</p>
<p>
<select name="rating" size=1>
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
</p>
<p>
Click to assign:
</p>
<p>
<input type="button" name="Assign" value="Assign" onClick="assignRating()">
</p>
<p>
Click to show:
</p>
<p>
<input type="button" name="Show" value="Show" onClick="showBook()">
</p>
</form></body>
</html>
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