javascript YUI 读码日记之 YAHOO.util.Dom – Part.4

var getXY = function() {     // 判断是否是 IE     if (document.documentElement.getBoundingClientRect) {         // 注1         return function(el) {             var box = el.getBoundingClientRect();             var rootNode = el.ownerDocument;             return [box.left +            Y.Dom.getDocumentScr