Ajax Pagination messed online, working offline on Mozilla Firefox

["ITP Vision Promotion" <itpvision@xxxxxxxxx>]

Hello,

I have implemented paging on Mysql Records with PHP, all works fine
offline, while online it produces a huge error on Mozilla Firefox
Error:
ERROR
The requested URL could not be retrieved

While trying to process the request:

POST /prod_ajax.php?page=5 HTTP/1.1Host: www.vijewellery.com
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US;
rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14
Accept:
application/x-shockwave-flash,text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive
Referer: http://www.vijewellery.com/prod.php
Cookie: PHPSESSID=8caa6us3ovb0viqrrp5fj70uv1
Pragma: no-cache
Cache-Control: no-cache
The following error was encountered:
    * Invalid Request
Some aspect of the HTTP Request is invalid. Possible problems:
    * Missing or unknown request method
    * Missing URL
    * Missing HTTP Identifier (HTTP/1.0)
    * Request is too large
    * Content-Length missing for POST or PUT requests
    * Illegal character in hostname; underscores are not allowed

Your cache administrator is webmaster.

My Code:
prod.php
function Submit_To_Ajax(page) {
   xmlHttp = AjaxHttpObject();
   if (xmlHttp==null) {
      alert("Your browser does not support AJAX !!!");
      return;
   }
   xmlHttp.onreadystatechange=StateChanged;
   xmlHttp.open("POST", page, true);
   xmlHttp.send(null);
}
function StateChanged() {
   if (xmlHttp.readyState == 4) {
      document.getElementById('AjaxDiv').innerHTML=xmlHttp.responseText;
   }
   else {
      document.getElementById('AjaxDiv').innerHTML='<img
src="images/loading_circles.gif" width="30" height="30">';
   }
}
prod_ajax.php
   echo " <a
href=\"javascript:Submit_To_Ajax('prod_ajax.php?page=$i$query$query2')\"
class = \"pagin\"
  
onclick=\"Submit_To_Ajax('prod_ajax.php?page=$i$query$query2')\">$i[/url]
" ;

Help APPRECIATED