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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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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The drag handler for a drag-and-drop operation USES all three mouse handlers: onmousedown, onmouseup, and onmousemove.

针对拖放操作的拖动处理程序使用了这三个鼠标处理程序：onmousedown、onmouseup和onmousemove。

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It first calls the restorer, which cleans up all the click-and-drag handlers, and then it calls the original onmouseup handler that the caller supplied.

它首先调用还原器，以清除所有的点击-拖动处理程序，然后调用调用者提供的原始的onmouseup处理程序。

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It first calls the restorer, which cleans up all the click-and-drag handlers, and then it calls the original onmouseup handler that the caller supplied.

它首先调用还原器，以清除所有的点击-拖动处理程序，然后调用调用者提供的原始的onmouseup处理程序。

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