parallax js

parallax.js

// Just a little vertical parllax goodness.
// You can play with the offsets for a more dramatic effect if you'd like.

$(function() {
  var $window = $(window);
  if ($window.width() > 640) {
    $('.parallax').each(function() {
      var self = $(this);

      $(window).scroll(function() {
        var offset = 70, // A little padding above the image to be safe
            yPos = ($window.scrollTop() / 3) - 70,
            coordinates = '50% '+ yPos + 'px';

        self.css({ backgroundPosition: coordinates });
      });
    });
  }
});