function ShowOrHide(div) {
  if (div != '') {
    var item = null;
    if (document.getElementById) {
      item = document.getElementById(div);}
    else if (document.all) {
      item = document.all[div];}
    else if (document.layers) {
      item = document.layers[div];}
    if (!item) {}
    else if (item.style) {
      if (item.style.display == "none") { item.style.display = "";}
        else {item.style.display = "none";}}
    else {item.visibility = "show";}
  }
}