You could implement this notification using a floating DIV section display during activity, or using a simple message on the browser's status bar (although this is considered bad form by some).

您可以在活动过程中使用浮点DIV部分显示或使用浏览器状态栏上的简单消息实现此通知(不过，有些人认为这不是好的形式)。

youdao

You can display output as octal, hex, decimal, floating point, ASCII with backslash escapes, or named characters (nl for newline, ht for horizontal TAB, etc.).

您可以将输出显示为八进制、十六进制、十进制、浮点数、包含反斜杠转义符的ASCII，或者指定的字符(nl表示换行、ht表示水平制表符，等等)。

youdao

A popup window that can be used to display an arbitrary view. The popup Windows is a floating container that appears on top of the current activity.

一个弹出窗口，可以用来显示一个任意的看法。弹出窗口是一个浮动的容器，对当前活动顶部。

youdao

' While watching a video, with the touch of a button, the video will become a floating window on the display.

ENGADGET: Samsung Galaxy Note II to land 'by mid-November' on all major US carriers

Their new MW221U display has already been floating around a few online stores, but now it looks like it's getting official, along with a whole new lineup of displays.

ENGADGET: ASUS joins the 22-inch madness with the MW221U

Apart from that, there are a handful of unverified specs floating about, like a 4.5-inch qHD display, unknown dual-core processor clocked at 1GHz, five-megapixel camera and DTS sound (as indicated by backplate branding).

ENGADGET: Alleged shots of Acer's first Jelly Bean smartphone pop up on Chinese site