function unscramble(str) {
    if (str)
    { return str.replace(/5t6t/g, '@').replace(/1q2w/g, '.'); }
    else {return "";}
}

$(function () {
    $('.xemail').each(function (i, e) {
        var _this = $(e);
        var href = _this.attr('href');
        var txt = _this.text();
        _this.attr('href', unscramble(href));
        _this.text(unscramble(txt));
    });
});