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')=='externo') {
                anchor.target = '_blank';
                var title = anchor.title + ' (Este link abre uma nova janela)';
                anchor.title = title;
            }
        }
    }
}