js获得高度(国外英文资料).docVIP

js获得高度(国外英文资料) Parameters for obtaining coordinates in JavaScript 1. offsetTop, offsetLeft, offsetWidth, offsetHeight Suppose that obj is a HTML control. Obj.offsetTop refers to the position of obj above or above the upper level, integer, unit pixel. Obj.offsetLeft obj refers to the distance on the left or upper control position, integer pixel unit. Obj.offsetWidth refers to the width, integer, and unit pixel of the obj control itself. Obj.offsetHeight refers to the height, integer, and unit pixel of the obj control itself. We mentioned the above or the upper and left or upper control to explain. Such as: The offsetTop of the submit button refers to the distance of the submit button from the border on the tool layer, since the nearest upper layer is the upper layer of the tool layer. The offsetTop of the reset button means the distance to the reset button from the border on the tool layer, because the upper border of the tool layer is closest to it. The offsetLeft of the submit button refers to the distance of the submit button from the left border of the tool layer, because the nearest left border is the tool layer. The offsetLeft of the reset button means the distance to the reset button from the right border of the submit button, because the nearest right hand side of the submit button is on the left. Two ScrollTop is the height value of the volume, an example: --div style=! width:100px; height:100px; background-color:#FF0000; overflow:hidden; id= P br div style= / width:50px; height:300px; background-color:#0000FF; id= t if scrollTop is set to P, the content may not be fully displayed. /divbr / /divbr / script / type= text/javascript br var P = document.getElementById (P); br / p.scrollTop = 10; br / /script-- script type= text/javascript Var P = document.getElementById (P); P.scrollTop = 10; /script Because the scrollTop is set to the outer element P, so the inner elements to roll up. The same is true of scrollLeft. We already know that offsetHeight is the