取指定id的元素的坐标
由 admin 发表于 11:53function getCoords(node){
var x = node.offsetLeft;
var y = node.offsetTop;
var parent = node.offsetParent;
while (parent != null){
x += parent.offsetLeft;
y += parent.offsetTop;
parent = parent.offsetParent;
}
return {x: x, y: y};
}
