Web浏览器环境外文翻译资料

Web浏览器环境外文翻译资料(中文3600字+英文2000字)
要理解客户端JavaScript，必须理解Web浏览器所提供的编程环境。接下来的章节介绍的是在Web浏览器提供的编程环境下的三个重要特性：
•    作为全局对象的Window对象和客户端JavaScript代码的全局执行环境。
•    客户端对象的层次和构成它的一部分的文档对象模型（DOM）。
•    事件驱动的编程模型。
这些小节之后将讨论JavaScript在Web应用程序开发中的扮演的适当角色。


The Web Browser Environment
To understand client-side JavaScript, you must understand the programming environment provided by a web browser. The following sections introduce three important features of that programming environment:
•    The Window object that serves as the global object and global execution context for client-side JavaScript code
•    The client-side object hierarchy and the Document Object Model that forms a part of it
•    The event-driven programming model
These sections are followed by a discussion of the proper role of JavaScript in web application development.