Sets the "target" attribute for any links to external domains on your page.

external-links.js

function setExternalAnchorTargets (targetBrowserWindow) {
  var re = /^(https?:\/\/[^\/]+).*$/;
  var currentHref = window.location.href.replace(re, '$1');
  var reLocal = new RegExp('^' + currentHref.replace(/\./, '\\.'));
  var links = document.getElementsByTagName("a");
  for (var i = 0; i < links.length; i++) {
    if (links[i].href == '' || reLocal.test(links[i].href) || !/^http/.test(links[i].href)){
      continue;
    }else if (!links[i].target){
      links[i].target=targetBrowserWindow?targetBrowserWindow:"_BLANK";
    } //end else if
  } //end for
} //end function