Set Delay sets the display refreshing interval (its default value is 2 seconds).
Set Delay按钮设置显示刷新间隔(它的缺省值是2秒)。
You could automatically check that a user name or email address is not already in use, validate the form without refreshing the page, or even submit the form and display a result dynamically.
可以自动检查一个用户名或电子邮件地址是否已经不再使用，验证表单而无需刷新页面，甚至提交表单并动态显示一个结果。
Ajax is a means of providing Web application users with a rich experience by changing the display without refreshing the page.
Ajax是向Web应用程序用户提供丰富体验的方法，它可改变显示内容而不刷新页面。
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