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html/css js clientX screenX pageX offsetX
04-18
♚CSS3 & HTML5 offsetTop scrollTop clientX offsetX screenLeft
03-14
![clientX,screenX,pageX,offsetX的差別[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)