script-counter.js

(function() {
    function getSource(url, callback) {
        var xhr = new XMLHttpRequest();
        xhr.onreadystatechange = function() {
            if (xhr.readyState === XMLHttpRequest.DONE) {
                return callback(xhr.responseText);
            }
        };
        xhr.open('GET', url, true);
        xhr.send(null);
    }

    function countScripts(p) {
        var count = (p.match(/<script/g) || []).length;
        return (count);
    }
    var url = document.location.href;
    getSource(url, function(source) {
        console.log(url + "\n\tScripts in source: " + countScripts(source) + "\n\tScripts in DOM: " + document.getElementsByTagName("script").length);
    });
})();