function check_search() {
znaki=search.query.value;
dlugosc=3;
if (znaki.length<dlugosc)
 {
  alert ("Minimalna ilość znaków "+dlugosc+"!");
  return false;
 }
 return true;
}

function okno(url,w,h) {
if(window.screen){
 aw=screen.availWidth-15;
 ah=screen.availHeight-15;
}else{
 aw=640;
 ah=450;
}
 ustawienia=
 "left=" + (aw-w)/2 + ","
 +"top=" + (ah-h)/2 + ","
 +"screenX=" + (aw-w)/2 + ","
 +"screenY=" + (ah-h)/2 + ","
 +"width=" + w + ","
 +"height=" + h + ","
 +"innerWidth=" + w + ","
 +"innerHeight=" + h + ","
 +"toolbar=no,"
 +"location=no,"
 +"directories=no,"
 +"status=no,"
 +"menubar=no,"
 +"scrollbars=yes,"
 +"resizable=no"
var vWinCal=window.open(url,"NAWIGATOR",ustawienia);
vWinCal.opener = self;
vWinCal.focus();
}

function emailCheck() {
txt=document.emaile.email.value;
if (txt.indexOf("@")<3){
alert("Proszę podać prawidłowy adres e-mail!");
return false;
}
if ((txt.indexOf(".com")<5)&&(txt.indexOf(".org")<5)
&&(txt.indexOf(".gov")<5)&&(txt.indexOf(".net")<5)
&&(txt.indexOf(".mil")<5)&&(txt.indexOf(".edu")<5)&&(txt.indexOf(".pl")<5)){
alert("Proszę podać prawidłowy adres e-mail!");
return false;
   }
return true;
}