function send(f){ 
 if(f.tprefix.value=='691'||f.tprefix.value=='693'||f.tprefix.value=='601'||f.tprefix.value=='603'
||f.tprefix.value=='605'||f.tprefix.value=='607'||f.tprefix.value=='609'||f.tprefix.value=='661'||f.tprefix.value=='663'||f.tprefix.value=='695')
  {
  f.target='_self';f.action='http://vbs.pl/bramka/sms/sms_era/sms.php' 
  //f.target='n';f.action='http://www.text.plusgsm.pl/sms/sendsms.php' 
  //open('','n','menubar=0,width=300,height=197')
  } 
  else if(f.tprefix.value=='600'||f.tprefix.value=='602'||f.tprefix.value=='604'||f.tprefix.value=='606'||
         f.tprefix.value=='608'||f.tprefix.value=='690'||f.tprefix.value=='692'||f.tprefix.value=='694'||f.tprefix.value=='696'||f.tprefix.value=='698'||
         f.tprefix.value=='880'||f.tprefix.value=='887'||f.tprefix.value=='888'||f.tprefix.value=='889')
  {
  f.target='_self';f.action='http://vbs.pl/bramka/sms/sms_era/sms.php' 
  //open('','n','menubar=0,width=400,height=297')
  }
  else
  {
  f.target='_self'; f.action='http://vbs.pl/bramka/sms/sms.php' 
  }
}