Problem with Guessbook created in JSP

Question

I have a Guessbook project that i need to create a delete button in order to clear the message box, I have tryed everything and nothing works. I even use the same code from the submit button and it doesnot work. Please help me I only have one day left to turn in my project.
String submit = (String)request.getParameter("submit");
if(submit != null && submit.equals("Submit")){
String name = (String)request.getParameter("name");
String email = (String)request.getParameter("email");
String comment = (String)request.getParameter("comment");
String command = "insert into guessbook(name,email,comment,"+
"postdate) values ('"+name+"','"+email+"',"+
"'"+comment+"',now());";
%><p>SQL That we're telling the Database: <%=command%></p><%
java.sql.Statement statement = connection.createStatement();
statement.execute(command);
%>guessbook updated<br><%
String button = (String)response.clear("button");
if(button != null && button.equals("Clear")){
String name = (String)response.clear("name");
String email = (String)response.clear("email");
String comment = (String)response.clear("comment");
String command = "delete from guessbook(name,email,comment,"+
"postdate) values ('"+name+"','"+email+"',"+
"'"+comment+"',now());";
%><p>SQL That we're telling the Database: <%=command%></p><%
java.sql.Statement statement = connection.createStatement();
statement.execute(command);
%>guessbook updated<br><%

Answer 1

What about adding a reset button in your form?
<input type="reset" value="Clear form">