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;