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";

	}

}