js 中获取 某一个控件位置的函数及用法

1、函数：

function getposition(obj) {
var r = new Array();
r['x'] = obj.offsetLeft;
r['y'] = obj.offsetTop;
while (obj = obj.offsetParent) {
r['x'] += obj.offsetLeft;
r['y'] += obj.offsetTop;
}
return r;
}

2、 用法：

var p = getposition(document.getElementById('hintd'));

document.getElementById('hintdiv' + showtype).style.left = p['x'] + objleftoffset + "px";

document.getElementById('hintdiv' + showtype).style.top = p['y'] + objtopoffset + "px";