I have written following code let say in Page 1

<script type="text/javascript">

        function setSessionValue()
        {
            var selectedCarNoideId = "1026";                                
            <%Session["BannerNoideID"] = "'+ selectedCarNoideId +'";%>              
            alert('<%=Session["BannerNoideID"]%>');         
        }

</script>

And now retrieving session value on other page (Scripting File .chtml) using following code.

<h2>Session-:@Session["BannerNoideID"]  </h2>;

In the Page 1 alert PopUp displays "1026" as session value

But In Page 2

tag display following value as a output of session .

"Session-:'+ selectedCarNoideId +'"

Am I missing any thing ?