photowindow_op = null;
function photowindow(url, width, height, scroll){
 	scroll = 'yes';
  if (photowindow_op) photowindow_op.close();
	params = "status=no, menubar=no, scrollbars=no, resizeable=no, toolbar=no, location=no, directories=no, left=20, top=20, width=" + width + ", height=" + height;	
  photowindow_op = window.open('picture_big.php'+url, "photo", params);
  photowindow_op.focus();
}

function checkaddr(f) {
var email=/^[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*@[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*\.([A-Za-z]){2,5}$/i;
if (!email.test(f.email.value)) {
  alert("Podaj poprawny adres email!");
  f.email.focus();
  return (false);
}}