function OnLoadEventListener () {
  /* check if OnLoadHandler is defined in Page and execute if it is there */
  if (typeof(OnLoadHandler)=="function") {
    OnLoadHandler()
  }
}

function showitem(imgid) {
  var showme = document.getElementById(imgid);
  showme.style.display = ((showme.style.display == 'block') ? 'none' : 'block');
}