The modified onmouseup handler is a composite handler.

修改后的onmouseup处理程序是一个复合的处理程序。

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An alternative is to use onmouseup to catch any mouse release and check for the right button.

作为代替可以使用onmouseup事件来检测和处理松开鼠标右键的事件。

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The element's onmousedown handler is invoked, which installs onmousemove and onmouseup handlers.

此元素的 onmousedown 处理程序将被调用，它安装 onmousemove 和 onmouseup 处理程序。

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