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;