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;
$(document).ready(function () {
  $('#subnav li.this-section ul').show();
  $('#subnav li.this-section a.expand').css('cursor', 'pointer');
  $('#subnav li.this-section a.expand').click(function(e) {
    $(this).next().next().slideToggle('fast');
    (e).preventDefault();
  });
});