function mShow(object) {
  if (document.getElementById) document.getElementById(object).style.visibility = 'visible';
  else if (document.layers && document.layers[object]) document.layers[object].visibility = 'visible';
  else if (document.all) document.all[object].style.visibility = 'visible';
  }

function mHide(object) {
  if (document.getElementById) document.getElementById(object).style.visibility = 'hidden';
  else if (document.layers && document.layers[object]) document.layers[object].visibility = 'hidden';
  else if (document.all) document.all[object].style.visibility = 'hidden';
  }