kMediaGbR / silverstripe-recaptcha

function domReady(fn) {

    var fns = [],

        listener,

        doc = typeof document === 'object' && document,

        hack = doc && doc.documentElement.doScroll,

        domContentLoaded = 'DOMContentLoaded',

        loaded = doc && (hack ? /^loaded|^c/ : /^loaded|^i|^c/).test(doc.readyState);

    if (!loaded && doc) {

        doc.addEventListener(domContentLoaded, listener = function () {

            doc.removeEventListener(domContentLoaded, listener);

            loaded = 1;

            while (listener = fns.shift()) {

                listener();

            }

        })

    }

    if (loaded) {

        setTimeout(fn, 0);

    } else {

        fns.push(fn);

    }

}