function externalLinks() {
	if(document.getElementsByTagName){
		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";
			}
		}
	}
}
if(window.addEventListener) {
	window.addEventListener("load", externalLinks, false);
}
else if(window.attachEvent) {
	window.attachEvent("onload", externalLinks);
}