window.addEvent('domready', function() {

  if (Browser.Engine.trident)
    return;

  $$('#portfolio a').each(function(a) {
    a.tween('opacity', 0.65);

    a.addEvent('mouseover', function() {
      this.tween('opacity', 1);
    });
    a.addEvent('mouseout', function() {
      this.tween('opacity', 0.65);
    });
  });

});