JavaScript: Access session variables in Javascript

The other day, I was working on JSP & an Action file on my project in office, and suddenly I got stuck when I wanted to initialize a variable I was using in JQuery code with the value of session variable. I had used it earlier in some other JSP, but then some how it skipped my mind. 

So I thought of sharing the same here, if it might be of any help.

<%= session.getAttribute("variableName")%>

hope it helps...