function change_lan(i,s,p,t)
{
if (s==0)
{ document.location.href="/index.php?lan="+i+"&s="+s+"&p="+p+"&t="+t;	 }
else 
{ document.location.href="index.php?lan="+i+"&s="+s+"&p="+p+"&t="+t;	 }
}