// JavaScript Document

$.easing.custom = function (x, t, b, c, d) {
 var s = 1.70158; 
 if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;
 return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
 }
 $("div.scrollable").scrollable({easing: 'custom', speed: 700, circular: true});