// subory do noveho okna
function nph_open_window(url, name, feature) {window.open(url, name, feature).focus();}

// externe dokumenty
function externalLinks() {
   if (!document.getElementsByTagName) return;
   var anchors = document.getElementsByTagName("a");
   for (var i=0; i<anchors.length; i++) {
     var anchor = anchors[i];
     if (anchor.getAttribute("href") &&
         anchor.getAttribute("rel") == "external")
       anchor.target = "_blank";
   }
  }
  window.onload = externalLinks;