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";
	}
}
document.onload = externalLinks();