What is the logic flow in Struts?

Question

My understanding of the logic flow in Struts is as follows, I would love anybody to correct me.
/index.jsp
<logic:redirect forward="Entry" />The above "Entry" value is located in the struts-config.xml under the "global-forwards" section.
struts-config.xml
<global-forwards>
<forward name="Entry" path="/Login.do" /> ... The path from this "forward" entry is then used to locate an 'action' in the same file. The web.xml specifies that actions are mapped using a "*.do" mask, which I have in my web.xml file. Therefore we look for "/Login" as an action.
<action-mappings>
<action path="/Login" forward="/WEB-INF/login.jsp" /> ...Now we forward to the JSP identified and begin sending this to the client. However, we process it as we send it and we locate some more activities to perform.
/login.jsp
<html:form action="/LoginSubmit" focus="username">
  <html:text property="username" />
  <html:password property="password" />...In the JSP we find an 'html:form' referencing "/LoginSubmit". We look this up in the 'action-mappings' from our struts-config file too.
struts-config.xml
... <action path="/LoginSubmit" type="...LoginSubmitAction" name="loginForm" input="/WEB-INF/login.jsp" validate="true" scope="request" />...We have found the action statement for this JSP form and notice that there is a 'name' applied. This name should match up with a 'form-bean' from our same struts-config file, so we look that up too.
struts-config.xml
<form-beans>
<form-bean name="loginForm" type="...LoginForm" />This final entry identifies a 'form-bean' class that we create for our application. The java class specifies fields for the input items on the form, it can also specify default values and validation to perform.
...LoginForm.java (sorry about including all of this but it does help)
public class LoginForm extends ActionForm {
  private String password;
  private String username; 
  public LoginForm()
    super();
  public String getPassword()
    return this.password;
  public void setPassword(String password)
    this.password = password;
  public String getUsername()
    return this.username;
  public void setUsername(String username)
    this.username = username;
  public void reset(ActionMapping mapping, HttpServletRequest request)
    super.reset(mapping, request);
    setPassword(null);
    setUsername("murray");   
}I run the above and get a form appearing. It initialises "murray" into the username field, and this is displayed, however I get a javascript error trying to process the focus() request. The generated html form does not receive a name, for example:
<form method="post" action="/bookshelf/LoginSubmit.do;jsessionid=6D7525A5B4B4EBCABA71C679B227A510">The fact that the NAME doesn't appear makes me think that something is not linking correctly, or I have missed some important piece of the logic flow. Is there any other important aspect of this logic I have missed.

Answer 1

The error is simple. The HTML source from the page includes these code fragments:
<form method="post" action="/bookshelf/LoginSubmit.do">and
<script type="text/javascript">
  var focusControl = document.forms["loginForm"].elements["username"];
  if (focusControl.type != "hidden" && !focusControl.disabled) {
     focusControl.focus();
</script>The Javacript error reported is:
Error: 'document.forms.loginForm.elements' is null or not an object