enLOLcryption.

LOLcryption.js

String.prototype.enlolcrypt2 = function () {
    var cipher = "aeoiubcdfghjklmnpqrstvwxyz";
    return this.split("").map(function (T) {
        var c = /[A-Z]/.test(T), T = T.toLowerCase(), i = cipher.indexOf(T);
        if (/[^a-z]/.test(T)) { return T; }

        if (/[aeoiu]/.test(T)) {
          T = cipher[(i+2)%5];
        } else {
          T = cipher[(i+5)%21+5];
        }

        return c?T.toUpperCase():T;
    }).join("");
}

String.prototype.delolcrypt2 = function () {
    var cipher = "aeoiubcdfghjklmnpqrstvwxyz";
    return this.split("").map(function (T) {
        var c = /[A-Z]/.test(T), T = T.toLowerCase(), i = cipher.indexOf(T);
        if (/[^a-z]/.test(T)) { return T; }

        if (/[aeoiu]/.test(T)) {
          T = cipher[(i-2)%5];
        } else {
          T = cipher[(i-15)%21+5];
        }

        return c?T.toUpperCase():T;
    }).join("");
}