if (typeof FM === "undefined") {
    FM = { __namespace: true };
}

FM.ScriptLoader = function (urls, callback) {
    if (jQuery) {
        urls = (isArray(urls) ? urls : [urls]);
        callback = (isFunction(callback) ? callback : function () { });

        jQuery.when.apply(this, urls.map(loadScript)).done(callback);
    }

    function loadScript(url) {
        return jQuery.ajax({
            url: url,
            dataType: "script",
            async: true
        });
    };
    function isArray(obj) {
        return (
            obj != null &&
            Object.prototype.toString.call(obj) === "[object Array]");
    };
    function isFunction(obj) {
        return (
            obj != null &&
            typeof obj === "function");
    };
};