Prevent touch event when trying to scroll on touch enabled device

gistfile1.js

'use strict';

var App = App || {};

App.PhotoContainerView = Backbone.View.extend({

    el: '.photos-container',

    scrollY: 0,

    scrollYD: 0,

    events: function(){
        var action = (Modernizr.touch) ? 'touchend' : 'click',
            e = {};

        e[ 'touchstart .lightbox'] = 'setScrollY';
        e[ 'touchend .lightbox'] = 'checkForScroll';

        return e;
    },

    setScrollY: function(e){
        this.scrollY = $(window).scrollTop();
    },

    checkForScroll: function(){
        this.scrollYD = $(window).scrollTop();
        if(this.scrollY !== this.scrollYD){
            return false;
        }
    }

});