javascript对象有：String、Number、Boolean、Array、Date、RegExp、Math、Error、Object、Function、Global、Window和用户自定义对象。
本教程操作环境：windows7系统、ECMAScript 5版、Dell G3电脑。
1、JavaScript内置对象：
指JavaScript语言本身预定义的对象，在ECMAScript标准定义，由所有的浏览器厂家来提供具体实现，由于标准的统一，故这些对象的浏览器兼容性问题不太大
String、Number、Boolean、Array、Date、RegExp、Math、Error、Object、Function、Global
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2、JavaScript Window - 浏览器对象：
浏览器对象模型（Browser Object Model (BOM)）允许 JavaScript 与浏览器对话。
不存在浏览器对象模型（BOM）的官方标准。现代的浏览器已经（几乎）实现了 JavaScript 交互相同的方法和属性，因此它经常作为 BOM 的方法和属性被提到。
由于现代浏览器已经（几乎）实现了 JavaScript 交互性方面的相同方法和属性，因此常被认为是 BOM 的方法和属性。【推荐学习：js基础教程】
Window 对象：
所有浏览器都支持 window 对象。它表示浏览器窗口。
1）、window 对象是最顶层的对象；
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2）、window 对象有6大属性，包括：document、frames、history、location、navigator、screen，这6大属性本身也是对象；
3）、window 对象下的 document 属性也是对象，并且 document 下也有5大属性（anchors、forms、images、links、location）也是对象。
Window 对象属性：
| 属性 | 描述 |
|---|---|
| closed | 返回窗口是否已被关闭。 |
| defaultStatus | 设置或返回窗口状态栏中的默认文本。 |
| document | 对 Document 对象的只读引用。 |
| history | 对 History 对象的只读引用。 |
| innerheight | 返回窗口的文档显示区的高度。 |
| innerwidth | 返回窗口的文档显示区的宽度。 |
| length | 设置或返回窗口中的框架数量。 |
| location | 用于窗口或框架的 Location 对象。 |
| name | 设置或返回窗口的名称。 |
| Navigator | 对 Navigator 对象的只读引用。 |
| opener | 返回对创建此窗口的窗口的引用。 |
| outerheight | 返回窗口的外部高度。 |
| pageXOffset | 设置或返回当前页面相对于窗口显示区左上角的 X 位置。 |
| pageYOffset | 设置或返回当前页面相对于窗口显示区左上角的 Y 位置。 |
| parent | 返回父窗口。 |
| Screen | 对 Screen 对象的只读引用。 |
| self | 返回对当前窗口的引用。等价于 Window 属性。 |
| status | 设置窗口状态栏的文本。 |
| top | 返回最顶层的先辈窗口。 |
| window | window 属性等价于 self 属性，它包含了对窗口自身的引用。 |
| screenLeft/screenTop/screenX/screenY | 只读整数。声明了窗口的左上角在屏幕上的的 x 坐标和 y 坐标。IE、Safari 和 Opera 支持 screenLeft 和 screenTop，而 Firefox 和 Safari 支持 screenX 和 screenY。 |
Window 对象方法
| 方法 | 描述 |
|---|---|
| alert() | 显示带有一段消息和一个确认按钮的警告框。 |
| blur() | 把键盘焦点从顶层窗口移开。 |
| clearInterval() | 取消由 setInterval() 设置的 timeout。 |
| clearTimeout() | 取消由 setTimeout() 方法设置的 timeout。 |
| close() | 关闭浏览器窗口。 |
| confirm() | 显示带有一段消息以及确认按钮和取消按钮的对话框。 |
| createPopup() | 创建一个 pop-up 窗口。 |
| focus() | 把键盘焦点给予一个窗口。 |
| moveBy() | 可相对窗口的当前坐标把它移动指定的像素。 |
| moveTo() | 把窗口的左上角移动到一个指定的坐标。 |
| open() | 打开一个新的浏览器窗口或查找一个已命名的窗口。 |
| print() | 打印当前窗口的内容。 |
| prompt() | 显示可提示用户输入的对话框。 |
| resizeBy() | 按照指定的像素调整窗口的大小。 |
| resizeTo() | 把窗口的大小调整到指定的宽度和高度。 |
| scrollBy() | 按照指定的像素值来滚动内容。 |
| scrollTo() | 把内容滚动到指定的坐标。 |
| setInterval() | 按照指定的周期（以毫秒计）来调用函数或计算表达式。 |
| setTimeout() | 在指定的毫秒数后调用函数或计算表达式。 |
3、JavaScript自定义对象：
通过JavaScript，您能够定义并创建自己的对象。
创建新对象有两种不同的方法：
定义并创建对象的实例
使用函数来定义对象，然后创建新的对象实例
创建一个自定义对象：
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