Can a EL expression pass a value that was entered into a form?

After listening to Bear's suggestion

I'm tossing my previous code and am trying to write code using JSTL and EL.

What I am trying to accomplish currently is implementing session tracking. I just want to track the username used to login to a form and pass it from page to page as the user navigates the website.

I have a very simple two jsp pages setup to try to figure out how to pass what is input in the username field in the form.

index.jsp

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html;charset=windows-1256">
        <title>Login Page</title>
    </head>
    <body>
        <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
        <form method="post" action="securitycheck.jsp">
        <table border="5">
        <tr>
        <th colspan="2">Login</th>
        </tr>
        <tr>
        <td>Username:</td>
        <td><input type="text" name="un"/></td>
        <c:set var="username" value="${'un'}" scope="session"  />
        </tr>
        <tr>
        <td>Password:</td>
        <td><input type="password" name="pw"/></td>
        </tr>
        <tr>
        <th colspan="2"><input type="submit" value="Submit" name="Submit"/><input type="Reset" value="Reset" /></th>
        </tr>
        <tr>
            <td colspan="2"><input type="checkbox" value="remeber" /> Remember Me on this Computer<br /></td>
        </tr>
        </table>
        <p><a href="register">New users click here to register</a></p>
        </form>
</body>
</html>

securitycheck.jsp

Is what I'm trying to do possible? And if so, how?

Thanks everyone.

Looking at this code:

Let's see if I can help you answer your own question. Answer these questions:

When does the <c:set> get executed?

When does the user enter the value into the field?

How does this answer your question?

If you can't answer the questions, read this article and try again.

And (personal pet peeve): name="un". un? Use real words and keep things readable.

One more tidbit of information that may help.
EL defines an implicit variable called "param"

"param" is a map of all the request parameters, keyed by request parameter name.

${param.foo} is approximately equivalent to request.getParameter("foo");

I actually think you're taking Bear a little TOO literally.
Yes you want to stop scriptlets in the JSP, and use EL.
But you also want to use Java beans to encapsulate most of your data

So rather than having a <c:set> on the page I would go with creating a User Bean (java class) and populate that with values from the request parameters.

Stefan Evans wrote:
So rather than having a <c:set> on the page I would go with creating a User Bean (java class) and populate that with values from the request parameters.

I'd go as far as to say that collecting params isn't something that belongs in a JSP at all. But one thing at a time...