function openfoto(x,y)
  {
  var msirka = x;
  var mstredx = (screen.availWidth - msirka) / 2;
  var mvyska = y;
  var mstredy = (screen.availHeight - mvyska -100) / 2;
  var mparams = ('width='+ msirka +',height='+ mvyska +',left=' + mstredx +',top=' + mstredy +',resizable=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,toolbar=0');
  newokno=window.open('','foto',mparams);
  newokno.document.close();
  newokno.focus();
  }