Javascript String upperLower()

String.prototype.upperLower = function () {
    var result = [];
    var splited = this.split("");
    for (var i = 0; i < splited.length; i++) {
        if (i % 2 === 0) {
            result.push(splited[i].toLowerCase());
        } else {//from  ww  w. j  a v a 2s . c  om
            result.push(splited[i].toUpperCase());
        }
    }

    return result.join('');
}

var funnyText = "Smiesznie".upperLower();
console.log(funnyText);

String.prototype.upperLower = function () {
    var result = [];
    var splited = this.split(" "); //pojedyncze wyrazy tablica

    for (var i = 0; i < splited.length; i++) {
        var singleWord = splited[i];//pojedynczy wyraz
        var singleWordResult = '';
        for (var j = 0; j < singleWord.length; j++) {
            if (j % 2 === 0) {
                singleWordResult += singleWord[j].toLowerCase();
            } else {/*from  w ww . ja  va2s  .  co m*/
                singleWordResult += singleWord[j].toUpperCase();
            }
        }
        result.push(singleWordResult);
    }
    return result.join(' ');
}

var funnyTextWithSpace = "Javascript jest super".upperLower();
console.log(funnyTextWithSpace);