Change (reload from css) image on window resize about jarallax HOT 2 CLOSED

(function () {
    var $myJarallaxSection = $('.my-jarallax-section');
    var $window = $(window);

    // 768 and lower - small screen size
    var smallScreenSize = 768;
    var isSmallScreen = $window.width() < smallScreenSize;

    // init jarallax
    function initJarallax (reinit) {
        if(reinit) {
            $myJarallaxSection.jarallax('destroy');
        }
        $myJarallaxSection.jarallax();
    }
    initJarallax();

    // check if window resized
    var debounceResize;
    function resizeCheck () {
        clearTimeout(debounceResize);
        debounceResize = setTimeout(function () {
            var wndW = $window.width();
            if(isSmallScreen && wndW < smallScreenSize || !isSmallScreen && wndW >= smallScreenSize) {
                // nothing to do there
            } else {
                isSmallScreen = wndW < smallScreenSize;
                initJarallax(1);
            }
        }, 150);
    }
    $window.on('resize load orientationchange', resizeCheck);
    resizeCheck();
}());