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 = function() {
	externalLinks();
}