function external_link_init() {
	if (!document.getElementsByTagName) return;
	var elems = document.getElementsByTagName("a");
	for (var i=0; i<elems.length; i++) {
		var e = elems[i];
		if (e.getAttribute("href") && e.getAttribute("rel") == "external") {

			e.className = "external";
			e.target    = "_blank";
		}
	}
}
function addEvent(obj, evType, fn){
	 if (obj.addEventListener) {
		 obj.addEventListener(evType, fn, true);
		 return true;
	 } else if (obj.attachEvent) {
		 var r = obj.attachEvent("on"+evType, fn);
		 return r;
	 } else {
		return false;
	 }
}
addEvent(window, 'load', external_link_init);