var ExternalLink = new Class({
    initialize: function() {
        $$('a[rel*=external]').set('target', '_blank');
    }
});

window.addEvent('domready', function() {
    var el = new ExternalLink();
    var share = new ShareIcons('share_icons', {
        'services': [ 'facebook', 'delicious', 'digg', 'stumble', 'twitter' ]
    });
});