function location_set_page_amount(page_amount,now_url)
{
  //alert(now_url);
//   if(now_url != "")
//      now_url+=now_url+"&page_amount="+page_amount;
  
  location.href="set_page_amount.php?page_amount="+page_amount+"&now_url="+encodeURIComponent(now_url)+"";
}