请问 setCapture() 和 releaseCapture()是什么作用？

Question

setCapture() 获得鼠标拖动releaseCapture() 鼠标释放

Answer 1

setCapture Method：
Sets the mouse capture to the object belonging to the current document.releaseCapture Method：
Releases mouse capture from an object belonging to the current document. 

Answer 2

解释和例子
http://msdn.microsoft.com/workshop/author/dhtml/reference/methods/setcapture.asphttp://msdn.microsoft.com/workshop/author/dhtml/reference/methods/releasecapture.asphttp://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/dhtml_reference_entry.asp