.error-ns-bg{position:absolute;top:0;left:0;right:0;bottom:0;padding:50px 0;background-color:#e7f3f7;text-align:center;z-index:1000;width:100%;height:100%}.error-ns-btn-group{position:relative;margin:100px auto;width:170px}#error-ns-install,#error-ns-update{filter:alpha(opacity=0);cursor:pointer;position:absolute;z-index:1001;width:75px;height:30px;left:0}#error-ns-update{left:80px}