My preferred easing function

gistfile1.txt

// Add easeOutExpo easing
$.extend($.easing, { def: 'easeOutExpo',
  easeOutExpo: function(x, t, b, c, d){
    return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;
  }
});