function enlarge(url,tgt) {
  var win = window.open(url,tgt,'toolbar=no,location=yes,status=yes,menubar=yes,scrollbars=yes,resizable=yes,width=600,height=500');
  win.focus();
}

function showHide(tgt) {
  var obj = document.getElementById(tgt);
  if (obj) {
    if(obj.style.display == "none") obj.style.display = "block";
    else obj.style.display = "none";
  }
}