function sort(photoes) {
    var temp, j;
    for (var i = 1; i < photoes.length; i++) {
        if (compare(photoes[i], photoes[i - 1]) == -1) {
            temp = photoes[i];
            j = i - 1;
            do {
                photoes[j + 1] = photoes[j];
                j--;
            }
            while (j > -1 && compare(temp, photoes[j]) == -1);
            photoes[j + 1] = temp;
        } //endif
    }
}

function compare(p1, p2) {
    var n1 = p1.src;
    n1 = n1.substr(n1.lastIndexOf('/') + 1);
    var n2 = p2.src;
    n2 = n2.substr(n2.lastIndexOf('/') + 1);
    if (n1 < n2) return -1;
    if (n1 == n2) return 0;
    else return 1;
}

BTW:这个例子中photos是一个html image element的数组.