For some things in JavaScript, every time I look at the program, I don't know what I mean when I have written the program. I really have to find it today. I don't understand, but I still have to write a .client 1.clientHeight Read-only numeric value indicating the height of the element's content area in pixels2.clientLeft Read-only numeric value indicating the difference between the offsetLeft property and the beginning of the element's content area, in pixels3.clientTop Read-only numeric value indicating the difference between the offsetTop property and the beginning of the element's content area, in pixels4..clientWidth-only numeric value indicating the width of the element's content area in two aspects .offset pixels 5.offsetHeight Read-only numeric value indicating the height of the element in pixels.6.offsetLeft Read-only numeric value indicating the pixel offset of the left edge of the element, relative to its offsetParent7.offsetParent Read-only reference to the object relative to which the offsetHeight / Width / left / Top Is Calculated8.offSettop Read-Only Numeric Value Indicating The Pixel Offset of The Top Edge of T He Element, Relative To ITS OffsetParent9OffSetwidth Read-Only Numeric Value Indicating The Width of The Element in Pixels. General