The action will display a simple alert message when the user clicks the button.

当用户单击按钮时，该活动将显示一个简单的警报消息。

youdao

Try running this version of the Ajax code and you should only get the alert message one time, which is as it should be.

尝试运行新版本的 Ajax 代码，现在就会看到与预期的一样，只显示一次警告信息了。

youdao

If the valid function returns false for any of the two parameters, the remote call is canceled and an alert message is shown.

如果对于两个参数中的任何一个参数，valid函数返回false，那么取消远程调用，并显示一条警告消息。

youdao

He said staff refused to sell him the product after an alert message was displayed on the till.

BBC: Tesco burgers

Ms. Linkfield, who also confesses she has a text-message alert that whistles ("I was getting dirty looks" for that, she says), gave up on the line's Quiet Commute cars.

WSJ: Shhh! 'Quiet Cars' Turn Commuters Into Librarians

Programs like Outlook allow you to turn off any pop-up messages that alert you to a new message.

CNN: Experts: Goof off at work, read a book, ignore e-mail