// Open External Links as Blank Targets via Unobtrusive JavaScript
// http://perishablepress.com/press/2007/11/20/open-external-links-as-blank-targets-via-unobtrusive-javascript/

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