这通常是通过用户名和口令对话框提示实现的。

This is usually through a user name and password dialog prompt.

youdao

当您在浏览器中遇到一个要求认证的 Web 页面时，您通常得到一个对话框，让您为该 Web 页面输入您的用户标识和口令。

When you encounter a Web page in a browser that requires authentication you usually get a dialog box that lets you enter your userid and password for this Web page.

youdao

注意，您不必在这里指定口令；如果未指定口令，或口令不正确，就会显示登录提示对话框(除非您已经将该属性设置为false)。

Note that you do not have to specify a password here; if the password is not specified or incorrect, the login prompt dialog will be shown (unless you've set that property to false).

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