function init() {createExternalLinks();}
function createExternalLinks() {
    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';
                var title = anchor.title + ' (Este link abre uma nova janela)';
                anchor.title = title;
}}}}
            
function addEvent(obj, evType, fn){
    if(obj.addEventListener){
        obj.addEventListener(evType, fn, false);
        return true;
    } else if (obj.attachEvent){
        var r = obj.attachEvent('on'+evType, fn);
        return r;
    } 
		else {return false}
		}
addEvent(window, "load", init);