/* this javascript will make all links with the attribute rel="external"
 * open in a new window
 * found on www.sitepoint.com/article/standards-compliant-world    */

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;