About wide-height

Style.top
Style.left

Get wide Height
Offsetwidth
Offsetheight
Using styles to get a wide height can only get the width of the style set, and the width of the setting must use an inline style.
OffsetTop height from the parent container
Offsetleft Width from parent container
Use it also and the above one reason

ScrollTop the position of the bounding rectangle from the actual body top when the scroll bar is visible
ScrollLeft

If the pull is too fast, flashing may occur, you can use relative positioning to do the same effect

About wide-height