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.getAttribute("rel") == "external nofollow")))
			anchor.target = "_blank";
	}
}
window.onload = externalLinks;