image = "";
function showimage(url) {
  image = url;
  document.getElementById('popupcontent').innerHTML = '<img src="' + image + '">';
  document.getElementById('popup').style.visibility = 'visible';
  printframe.location.href = image;
}
function hideimage() {
  document.getElementById('popup').style.visibility = 'hidden';
}
function printimage() {
  window.print();
}