Onclick checkbox

Question

How to set checkbox value (or checked value) when onclick JavaScript event is occured.
I need to send the value of checkbox to the Action (struts - ActionForm )
I keep the allt value in the session scope and has to be changed when the checkbox status is changed.
In JSP I have this:
<%
            if (((String)session.getAttribute("allt")).equals("1")) {
  %>
       <input type="checkbox" NAME="all" value='<%= "1" %>' checked onclick="submitAllForm()">Show only the latest versions.</td>
       <% } else {
       %>
       <input type="checkbox" NAME="all" value='<%= "0" %>' onclick="submitAllForm()">Show only latest versions.</td>
       <% }
              %>       JavaScript
function submitAllTForm() {
     document.forms.allForm.submit();
}

Answer 1

JavaScript
function submitAllTempsForm() {
var x=document.forms.allTempsForm.alltemps1;
    alert('alltemps1  .'+ x.checked);
if  (x.checked) {
     document.forms.allTempsForm.alltemps.value= '1';
     else {
     document.forms.allTempsForm.alltemps.value= '0';
     document.forms.allTempsForm.submit();
}JSP
<html:form action="/AllTemplates.do?start=0">
<tr class="section_title" align="center" VALIGN="middle">
  <td height="30">
   <input type="hidden" name="alltemps" />
  <%
            if (((String)session.getAttribute("allt")).equals("1")) {
  %>
       <input type="checkbox" NAME="alltemps1" id="box" checked onclick="submitAllTempsForm();">Show only the latest versions.</td>
       <% } else {
       %>
       <input type="checkbox" NAME="alltemps1" id="box" onclick="submitAllTempsForm();">Show only the latest versions.</td>
       <% }
              %>       
</tr>
</html:form>   In ActionForm I have 2 properties - alltemps and alltemps1
In Java Action class (struts) - I check the value of form field and set the session variable allt. Different methods are called depands what I get from the form (checkbox).
The error is now in JavaScript:
saying that checked is a null or not an object.
What is wrong, please?