function openLivebookFromWidget() {
  if(screen.width <= 1024 || screen.height <= 970) {
    window.open("http://online.jdw.de/lb3_1.htm","Extern","width=1016,height=704,resizable=no,scrollbars=auto,toolbar=no,status=no,menubar=no,locationbar=no,screenX=20,screenY=50");
  } else {
    window.open("http://online.jdw.de/lb3_2.htm","Extern","width=1272,height=880,resizable=no,scrollbars=auto,toolbar=no,status=no,menubar=no,locationbar=no,screenX=20,screenY=50");
  }
}