function externalLinks()
{
	if (!document.getElementsByTagName) return;

	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++)
	{
		var anchor = anchors[i];
		var relvalue = anchor.getAttribute("rel");

		if (anchor.getAttribute("href"))
		{
			var external = /external/;
			var relvalue = anchor.getAttribute("rel");
			if (external.test(relvalue))
			{
				anchor.target = "_blank";
			}
		}
	}
}
window.onload = externalLinks;