<script language="javascript">
    var checkSubmitFlg = false;
    function checkSubmit()
 {
      if (checkSubmitFlg == true)
   {
         return false;
      }
      checkSubmitFlg = true;
      return true;
   }
   document.ondblclick = 
   function docondblclick()
   {
    window.event.returnValue = false;
   }
   document.onclick =
   function doconclick()
   {
       if (checkSubmitFlg)
    {
         window.event.returnValue = false;
       }
   }
</script>
<html:form action="myAction.do" 
method="post" onsubmit="return checkSubmit();">

<html:form action="myAction.do" 
method="post" 
    onsubmit="getElById('submitInput')
 .disabled = true;
 return true;
 ">  
  
  <html:image 
  styleId="submitInput"
  src="images/ok_b.gif" 
  border="0" />
  
  </html:form>

if (isTokenValid(request, true))
{
  // your code here
    return mapping.findForward("success");
} else
{
    saveToken(request);
    return mapping.findForward
 ("submitagain");
}