<script type="text/javascript"> var Book = function(newIsbn, newTitle, newAuthor) { // implements Publication// 私有屬性var isbn, title, author;// 私有方法 function checkIsbn(isbn) {if(isbn == undefined || typeof isbn != 'string') {return false;}return true; // All tests passed. } // 特權(quán)方法this.getIsbn = function() {return isbn;};this.setIsbn = function(newIsbn) {if(!checkIsbn(newIsbn)) throw new Error('Book: Invalid ISBN.');isbn = newIsbn;};this.getTitle = function() {return title;};this.setTitle = function(newTitle) {title = newTitle || 'No title specified';};this.getAuthor = function() {return author;};this.setAuthor = function(newAuthor) {author = newAuthor || 'No author specified';};// 構(gòu)造代碼this.setIsbn(newIsbn);this.setTitle(newTitle);this.setAuthor(newAuthor); };// Public, non-privileged methods. Book.prototype = {display: function() {alert("isbn:"+this.getIsbn()+" title:"+this.getTitle()+" author:"+this.getAuthor());} };//var theHobbit = new Book(123, '', 'J. R. R. Tolkein'); // 非字符串拋出異常 var theHobbit = new Book('1990-78sd-1092', '', 'J. R. R. Tolkein'); theHobbit.display(); // Outputs the data by creating and populating an HTML element.</script>

必須通過(guò)get方法來(lái)獲取數(shù)據(jù)，因?yàn)閿?shù)據(jù)是私有的。

js設(shè)計(jì)模式太牛逼了。

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