When done correctly, Ajax form validation can vastly improve your user experience and make your code more efficient and maintainable.
若能正确处理，Ajax 表单验证可极大地改进用户体验并能让代码变得更为有效、可维护性更好。
The BLL consists of value providers that provide data to the Ajax-enabled controls, and server-side validators that provide server validation for HTML form data.
BLL包括向支持Ajax的控件提供数据的值提供程序，以及为HTML表单数据提供服务器验证的服务器端验证程序。
Form validation is a simple example of how to begin to use Ajax within an existing J2EE application.
表单验证展示了如何在现有J2EE应用程序开始使用Ajax。
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