//-----------------------------------------------------
//--- Slideshow changes -------------------------------
//-----------------------------------------------------
function openslideshow(url,window_width,window_height,new_window) {
  if (new_window == 2 || new_window == 1) {
    var width_avail = screen.availWidth-15;
    var height_avail = screen.availHeight-60;
    var width_full = screen.width;
    var height_full = screen.height;

    // Callculate the spaces from left and top to center the new window:
    var left_space = ((width_avail - window_width) > 0) ? parseInt((width_avail - window_width) / 2) : 0;
    var top_space = ((height_avail - window_height) > 0) ? parseInt((height_avail - window_height) / 2) : 0;
    if (new_window == 2) {
      window_width = width_avail;
      window_height = height_avail;
      left_space = 0;
      top_space = 0;
      url += "&maw="+(window_width-97)+"&mah="+(window_height-194)+"&msw="+width_full+"&msh="+height_full;
    } // if complete picture (whole window)

    slideshow_window = window.open(url,"slideshowwindow","resizable=yes,dependent=yes,hotkeys=no,location=no,menubar=no,scrollbars=yes,status=yes,toolbar=no,width="+window_width+",height="+window_height+",left="+left_space+",top="+top_space+"");
  } // if new_window
  else {
    window.location.href=url;
  } // else new_window
} // openslideshow