(function() {
    document.observe(
        'dom:loaded', 
        function() {
            var i = document.createElement('input');
            if(!('autofocus' in i)) {
                var elems = $$('input[autofocus]');
                if(elems.length >= 1) {
                    elems[0].focus();
                }
            }
        }
    );
})();