function showPictureBox() {
  document.getElementById('picblanker').style.visibility='visible';
  document.getElementById('picwindow').style.visibility='visible';
}

function hidePictureBox() {
  document.getElementById('picblanker').style.visibility='hidden';
  document.getElementById('picwindow').style.visibility='hidden';
}


function showVideoBox() {
  document.getElementById('vidblanker').style.visibility='visible';
  document.getElementById('vidwindow').style.visibility='visible';
}

function hideVideoBox() {
  document.getElementById('vidblanker').style.visibility='hidden';
  document.getElementById('vidwindow').style.visibility='hidden';
}