Session Problem

<%
for(int i = 0; i < n_row ; i++)
{
    course_name = dbManager.get_course_name(teachers_course_id_list[i]);
    course_id = teachers_course_id_list[i];
%>
    table = '<tr><td> <a href="MarkDistribution1.jsp"> ' + "<%=course_id%>" + ': ' + "<%=course_name%>"+'</td></a></tr>'
    document.write(table);
<%
    }
%>