function _el(id){
    return document.getElementById(id);
}

function showHide(id, show) {
  var s='';
  if (show) {
    if (!document.all) s=(show=='inline')?'inline':'block';
  } else {
    s='none';
  }
  _el(id).style.display=s;
}

function showIf(s,f,v,e,g) {
  //alert ('Compare ' + f + ' with ' + v);
  if (f == v) {
    $(s).show(e).focus();
  } else {
    $(s).hide();
  }
}