$(document).ready(function()
{
  $("a.fancybox[rel=gallery]").fancybox(
  {
    titleShow : false,
    transitionIn : 'none',
    transitionOut : 'none',
    titlePosition : 'over',
    overlayShow: true,
    overlayOpacity: 0.5,
    hideOnOverlayClick: false,
    hideOnContentClick: false,
    zoomSpeedIn: 1500,
    zoomSpeedOut:600,
    showNavArrows: true
  });
});