anchor.diff:  	        //select the user table from the underlying db and validate the user name and password
           	Statement stmt = null;
   	        ResultSet rset = null;
  -        	String sql = "select PWD from login where id = '"+userName+"'";
  +        	String sql = "select PWD from login where id = '"+username+"'";
   	        out.println(sql);
           	try{
   	        	stmt = conn.createStatement();
  
positive.code: 	        	truepwd = (rset.getString(1)).trim();
  	
          	//display the result
  	        if(passwd.equals(truepwd))
  		        out.println("<p><b>Your Login is Successful!</b></p>");
          	else
  	        	out.println("<p><b>Either your userName or Your password is inValid!</b></p>");
  
                  try{
                          conn.close();
  
negative.code: <HEAD>
  
  
  <TITLE>Radiology Information System Login</TITLE>
  </HEAD>
  
  <BODY>
  