This script will load multiple JS files dynamically without jQuery

js-autoloader.js

var loadJS = function() {

    var index = 0;

    function createScript(url, location) {
        var script = document.createElement('script');
            script.src = url;
            script.type = 'text/javascript';
            script.location = location;
            script.onload = indexCount;
        return script;
    }

    var scripts = [
        createScript('/path/scriptOne.js', document.head),
        createScript('/path/scriptTwo.js', document.head),
        createScript('/path/scriptThree.js', document.body),
        createScript('/path/scriptFour.js', document.body)
    ];

    function sendScript(index) {
        scripts[index].location.appendChild(scripts[index]);
    }

    function indexCount() {
        if (index < scripts.length) {
            sendScript(index);
            index++;
        }
    }

    indexCount();

}();