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")) 
			anchor.target =anchor.getAttribute("rel");
	} 
} 
window.onload = externalLinks;