$(function () {

    function rotate(spanid, arrayOfWords) {

        var $mySpan = $("#" + spanid);

        (function repeatRotate(index) {

            var i = index || 0;

  $mySpan.text(arrayOfWords[i]).fadeIn(2000).delay(2000).fadeOut(2000, function () {

                i = (i === arrayOfWords.length - 1) ? 0 : ++i;

                repeatRotate(i);

            });

        })();

    }

    rotate("rotate", ["word1", "word2", "word3"]);

});