function OpenScreenshotViewer( ShotFilename ) 
{
  popupWin = window.open( ShotFilename, 'ScreenshotViewer', 'location=0,menubar=0,statusbar=0,toolbar=0,resizable=1,scrollbars=1,width=980,height=680,left=0,top=0');
  popupWin.focus();
}