anchor.diff:      </tr>
       <tr>
         <th scope="row">Nickname</th>
  -      <form action="profile" method="post"> 
         <td>
  -      	<input type="text" class="form-control" name="nickname" value="<%=request.getSession().getAttribute("nickname")%>">
  -  	  </td>
  -  	  <td>
  -  	  	<button type="submit" class="btn btn-primary btn-lg" onclick="<% request.getSession().setAttribute("nickname", request.getParameter("nickname")); %>" > Change 
  -  	  					</button>  
  -		</td>
  -		</form>
  +      	<input type="text" class="form-control" name="nickname" placeholder="<%=request.getSession().getAttribute("nickname")%>">
  +  	  </td><td></td>
  +    </tr>
  +    <tr>
  +      <th scope="row">Country</th>
  +      <td>
  +      	<input type="text" class="form-control" name="country" placeholder="<%=request.getSession().getAttribute("country")%>">
  +  	  </td><td></td>
       </tr>
       <tr>
         <th scope="row">DOB</th>
  -      <form action="profile" method="post"> 
         <td>
  -      	<input type="text" class="form-control" name="DOB" value="<%=request.getSession().getAttribute("DOB")%>">
  +      	<input type="text" class="form-control" name="DOB" placeholder="<%=request.getSession().getAttribute("DOB")%>">
     	  </td>
  -  	  <td>
  -  	  	<button type="submit" class="btn btn-primary btn-lg" onclick="<% request.getSession().setAttribute("DOB", request.getParameter("DOB")); %>" > Change 
  -  	  					</button>  
  -		</td>
  -		</form>
  +  	  <td>YYYY-MM-DD format</td>
       </tr>
  +    <tr>
  +    <td></td>
  +    <td>
  +    	<button class="btn btn-primary btn-block" >Update</button>
  +    	</td><td></td>
  +    </tr>
  +    </form>
     </tbody>
   </table>
   </body>
  
positive.code:     </tr>
      <tr>
        <th scope="row">College</th>
        <form action="profile" method="post"> 
        <td>
        	<input type="text" class="form-control" name="collegename" placeholder="<%=request.getSession().getAttribute("collegename")%> ">
    	  </td>
    	  <td>
    	  	<button type="submit" class="btn btn-primary btn-lg"> Change 
    	  					</button>  
  		</td>
  		</form>
      </tr>
      <tr>
        <th scope="row">Username</th>
  
negative.code: <html>
  <head>
  	<title>Profile Page</title>
  	<link rel="stylesheet" type="text/css" href="./css/bootstrap.css">
  </head>
  <%@page import = "java.sql.DriverManager"%>
  <%@page import = "java.sql.ResultSet"%>
  <%@page import = "java.sql.PreparedStatement"%>
  <%@page import = "java.sql.Connection"%>
  <%!
  	boolean collegeChangeFlag= false;
  %>
  <body>
  	<nav class="navbar sticky-top navbar-inverse bg-primary">
  	<!-- <a  href="#" style="color:#FFFFFF; font-size: 25px;" align="right">Profile</a> -->
  