/*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;
*/


/* Prototype */
document.observe("dom:loaded", function() {
  $$('a[rel="external"]').each(function(link){
    link.target = "_blank";
  });
});

/* jquery */
/*$(document).ready(function(){
  $('a[rel="external"]').attr('target', '_blank');
});*/