=undefined){returnthis.obj;}else{return"nosuchElement";}},//获得对象的父节点的id,如果没有则设置一个getElementParent:function(){if(this.obj!=undefined){if{obj.setAttribute;}returnobj.id;}else{return"nosuchparentNode";}}else{return"nosuchParentNode";}},//获得对象的页面坐标getElementO