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") == "link" || anchor.getAttribute("rel") == "links")
                anchor.target = "_blank";
        }
}
window.onload = externalLinks;