function hide(el) {
  document.getElementById(el).style.visibility = "hidden";
};

function OpenJob() {
  var w = 565;
  var h = 250;
  var winX = (screen.availWidth - w)*0.5;
  var winY = (screen.availHeight - h)*0.5;
  window.open('job00002.htm', 'Praca w Samson','width=' + w + ',height=' + h + ',left=' + winX + ',top=' + winY + ',scrollbars=0,toolbar=0;');
};