获取当前域的top对象topWindow
//获取当前域的top对象topWindow window.topWindow = function () { var obj = window.self, t_obj = obj; try { if (window.top.location.host) { return window.top; } } catch (e) { while (true) { try { if (obj.location.host) { t_obj = obj; obj = obj.window.parent; } } catch (e) { return t_obj; } } } }();