alert in jsp

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alert in jsp

if(pass.equals(pwd)) { Statement st1=conn.createStatement(); st.executeUpdate("update password set Password='"+npwd+"' where Ename='"+ename+"'"); out.println("password is successfully changed"); %> <% st1.close(); conn.close(); } else { out.println("please enter old Password"); %>

<script>
  alert("please enter old Password");

<% } }catch(Exception e){ out.print(e); e.printStackTrace(); }

%> this code is possible to run in jsp? bcz its doesn't shown alert message?, please give me a code how to write alert box in jsp?

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