function effectOpenClose (theID) {
  
  style_display = document.getElementById(theID).style.display;
  if (style_display == "none") {
    document.getElementById(theID).style.display = "";
  } else if ((style_display == "") || (style_display == "undefined")) {
    document.getElementById(theID).style.display = "none";
  }
  
  return false;
}