JSP causing JS to error

hi,

Just a wired error: NullPointerException

JSP page:

...
//javascript
...
function main()
{
...
okay();
...
}
function okay()
{
 <% System.out.print("................"); %>
 alert("hi");
 return true;
}


Works fine. But when I add this code it shows me error:

function okay()
{
 <% System.out.print("................");
              //  Calling Stored Procedure
               CallableStatement cs2 = conn.prepareCall("{call abc(?) }");
               cs2.setString(1, userID);
               cs2.execute();
%>

 return true;
}

PS: All variable is define and I'm getting all valid values

thx,
PH