mxPopupMenu.prototype.isMenuShowing=function(){return null!=this.div&&this.div.parentNode==document.body};mxPopupMenu.prototype.showMenu=function(){9<=document.documentMode&&(this.div.style.filter="none");document.body.appendChild(this.div);mxUtils.fit(this.div)};mxPopupMenu.prototype.hideMenu=function(){null!=this.div&&(null!=this.div.parentNode&&this.div.parentNode.removeChild(this.div),this.hideSubmenu(this),this.containsItems=!1,this.fireEvent(new mxEventObject(mxEvent.HIDE)))};