取得网页元素的坐标以及大小

获得网页元素的坐标以及大小

region = function(o){    var x = 0,y = 0,w = 0,h = 0;    switch(o.length){      case 1:        var r = region([]);        var m = o[0];var e = o[0];        w = m.offsetWidth;        h = m.offsetHeight;        if (m.getBoundingClientRect) {x = m.getBoundingClientRect().left + r.x - $([]).documentElement.clientLeft;y = m.getBoundingClientRect().top + r.y - $([]).documentElement.clientTop;}else {for (; m; x += m.offsetLeft, y += m.offsetTop, m = m.offsetParent);for (var e = e.parentNode; e && e != document.body; e = e.parentNode) {if (e.scrollTop) y -= e.scrollTop;if (e.scrollLeft)x -= e.scrollLeft;}}        break;      default:        x = Math.max($([]).documentElement.scrollLeft,$([]).body.scrollLeft);        y = Math.max($([]).documentElement.scrollTop,$([]).body.scrollTop);        w = $([]).documentElement.clientWidth;        h = $([]).documentElement.clientHeight;    }    return {'x':x,'y':y,'width':w,'height':h};  }