Delayed loader for images

imgLoader.js

// you need on the HTML to set the img url into the data-src, and the pre-load img(gif) on the src
// function below gets your data-src info and set it on the src attribute after 1500ms

window.setTimeout(function() {
    var images = document.getElementsByTagName('img');

    for (var i = 0; i < images.length; i++) {
        var currImage = images[i];

        if (currImage.getAttribute('data-src')) {
            currImage.setAttribute('src', currImage.getAttribute('data-src'));
        }
    }
}, 1500);