The problem is around that
+
in the middle of nowhere - you should not mess with the code and the markup!
<asp:hyperlink id="F" runat="server" font-underline="false" NavigateUrl="StageCourseExeList.aspx?id=<%=TFCourseID.Text.Trim();%>" rel="[facebox]" rev="iframe|300|400">
<img style="cursor:pointer" alt="" src="/Images/admin/grid/Show.gif" />
</asp:hyperlink>