Old fashioned loader

loader.js

var loading = "\\|/—",
    tick = 0,
    loadingElement = document.createElement('div');

loadingElement.id = 'loading';
loadingElement.style.fontFamily = 'Consolas, "Liberation Mono", Courier, monospace';
document.body.innerHTML = '';
document.body.appendChild(loadingElement);
(function animate() {
    tick = (tick + 1) % loading.length;
    var $element = document.querySelector('#loading');
    if ($element) {
        $element.innerHTML = ["Loading", loading[tick]].join(' ... ');
        setTimeout(animate, 100);
    }
})();

See it in action: http://jsfiddle.net/nkbt/1Ldm1bqt/embedded/result/