关于html中对象的坐标 散记

function getPS(node)

{

if(typeof node=='string')

node=document.getElementById(node);

node=document.getElementById(node);

var offsetTop = node.offsetTop;

var offsetLeft = node.offsetLeft;

var offsetWidth = node.offsetWidth;

var offsetHeight = node.offsetHeight;

 while (node = node.offsetParent)

{

offsetTop += node.offsetTop;

offsetLeft += node.offsetLeft;

}

return { left: offsetLeft, top: offsetTop, width: offsetWidth, height: offsetHeight }

}

 

oRect = obj.getBoundingClientRect();  //获取坐标

 

$('divLogin').style.top = screen.height / 2 + 80;  屏幕的坐标