document.addEventListener("DOMContentLoaded", function() {
    var lazyImages = document.querySelectorAll('img[lazy-images');
    function handlerLazyLoadImages() {
        Array.prototype.forEach.call(lazyImages, function(img) {
            if ((img.getBoundingClientRect().top <= window.innerHeight && img.getBoundingClientRect().bottom >= 0) && getComputedStyle(img).display != 'none') {
                img.setAttribute('src', img.getAttribute('lazy-images'));
                img.removeAttribute('lazy-images');
            }
        });
        lazyImages = document.querySelectorAll('img[lazy-images');
    }
    handlerLazyLoadImages();
    document.addEventListener('scroll', handlerLazyLoadImages);
    window.addEventListener("resize", handlerLazyLoadImages);
    window.addEventListener("orientationchange", handlerLazyLoadImages);
});