function popup (url) {
  window.open(url,'popup','width=1000 height=200 top=50 left=50 toolbar=no location=no directories=no status=no scrollbars=yes resizable=yes menubar=no');
}
function zoom() {
  if (document.getElementById('ima').height=="580"||document.getElementById('ima').height=="800") {
    document.getElementById('ima').alt="Zoom Out";
    document.getElementById('ifr').height=document.getElementById('ima').height;
    document.getElementById('ima').height="20";
  } else {
    document.getElementById('ima').alt="Zoom In";
    document.getElementById('ima').height=document.getElementById('ifr').height;
    document.getElementById('ifr').height="0";
  }
}