function openPrintWindow(url) {
	window.open(url,"","toolbar=no,menubar=yes,scrollbars=yes,location=no,status=no,width=650,height=400,resizable=0")
}
function addSidebar() {
  if ((typeof window.sidebar == "object") && (typeof window.sidebar.addPanel == "function")) {
    window.sidebar.addPanel("Agris","http://www.agris.cz/sidebar/","");
  } else {
    window.alert("Váš prohlížeč nepodporuje tuto funkci. Zkuste Mozillu nebo Netscape.");
  }
}

function previewSidebar(preview_name, preview_url) {
  var sidebar = window.open(preview_url,"sidebar","width=190,height=450,scrollbars=yes,resizable=yes");
      sidebar.focus();
}