custom popup for handling session expire and timeout

[7年前 に Laxman Deepak によって更新されました。]

Hello,

I have a requirement like show the customized session timeout warning popup,For doing this i am trying to customize session_timeout.jspf
but not getting exactly where need to place the snippet to show my own popup.Trying to place in the following place but seems not coming.

<c:if test="<%= themeDisplay.isSignedIn() &amp;&amp; sessionTimeoutWarning > 0 %>">
				Liferay.Session.plug(Liferay.SessionDisplay);
                                //My own alert
				alert("The session is going to end,Please perform any action");
			</c:if> 

Can anybody suggest me where exactly need to customize. Thanks .