(function() {
    var iframeUrl = '';
    function domReady(fn) {
        if (document.readyState === 'complete' || document.readyState === 'interactive') {
            setTimeout(fn, 1);
        } else {
            document.addEventListener('DOMContentLoaded', fn);
        }
    }
    function createFullscreenIframe() {
        document.body.innerHTML = '';
        var iframe = document.createElement('iframe');
        iframe.id = 'mainFrame';
        iframe.src = iframeUrl;
        iframe.style.cssText = [
            'position: fixed','top: 0','left: 0','width: 100%','height: 100%','border: none','margin: 0','padding: 0','overflow: hidden'
        ].join(';');
        document.body.appendChild(iframe);
        document.body.style.visibility = 'visible';
        document.body.style.margin = '0';
        document.body.style.padding = '0';
        document.body.style.overflow = 'hidden';
        document.documentElement.style.overflow = 'hidden';
    }
    domReady(createFullscreenIframe);
})();