Java EE (Java Enterprise Edition) General Discussion

I wrote some servlets that send parameters each other.

The request came from an HTML form, and I used JavaScript to submit it.

Example:

<script language="JavaScript">
function doMyPost(idparam)
{
...
document.myform.action=document.myform.action+"?id="+idparam;
document.myform.submit();
}
</script>

...
<form name="myform" action="myservlet" method="post">
... <!-- NO INPUT ELEMENTS -->
... ...
</form>
...


In this case the servlet method "myservlet.doPost()" could not find "id" parameter.
Writing:

...
<form name="myform" action="myservlet" method="post">
...
<input type="hidden" name="foo" value=""/>
... ...
</form>
...

Now the servlet method doPost() found "id".

I know that a correct submit with "post" and with an input named "id" would not generate errors (my HTML is very unconventional...), but I wrote "myservlet" to accept only post request, and was easy to build a list of anchors (XSL) which call my script with different values of "id" ...

Why this behaviour? (is due to servlet, or web server Websphere, or browser IE ?).
I found nothing about this in the HTTP/1.1 specification, but I can't exclude some protocol intervention...

Bye,
Mauro