email,nickname,mobile,password

Validator.js

// RegExp copied from sina weibo;)

function makeReFn(regStr) {
    var re = typeof regStr == 'string' ? new RegExp(regStr) : regStr;
    return function (beRegStr) {
        if (re.test(beRegStr)) {
            return true;
        } else {
            return false;
        }
    };
}

function byteLength(str) {
    if (!str) {
        return 0;
    }
    var aMatch = str.match(/[^\x00-\xff]/g);
    return (str.length + (!aMatch ? 0 : aMatch.length));
}

// ASCII, chinese, wihtespace, '-'
var reNick = makeReFn(/^[0-9a-zA-Z_\u4e00-\u9fa5\s-]*$/),
reMobile = makeReFn("^1(\\d{10})+$"),
rePassword = makeReFn("^([\\w\\~\\!\\@\\#\\$\\%\\^\\&\\*\\(\\)\\+\\`\\-\\=\\[\\]\\\\{\\}\\|\\;\\'\\:\\\"\\,\\.\\/\\<\\>\\?]{6,16})$");

var Validator = function(trim) {
    this.trim = trim === undefined ? true : trim;
};

Validator.prototype = {
    reNick: reNick,
    // byte length between 4 and 20, any ASCII, chinese, wihtespace(not leading/ending), '-' except all numbers
    // not leading with '_', '-', ' '
    nick: function(nick) {
        if (typeof nick != 'string') {
            return false;
        }
        this.trim && (nick = nick.trim());
        var len = byteLength(nick);
        if (len < 4 || len > 20) {
            return false;
        }
        if (!this.reNick(nick)) {
            return false;
        }
        if (/^[0-9]*$/.test(nick)) {
            return false;
        }
        if (/^[_-]/.test(nick)) {
            return false;
        }
        return nick;
    },
    email: function (eml) {
        if (typeof eml != 'string') {
            return false;
        }
        this.trim && (eml = eml.trim());
        if (!/^[\.\w]([(\/)(\-)(\+).\w])*@([(\-)\w]{1,64}\.){1,7}[(\-)\w]{1,64}$/.test(eml)) {
            return false;
        } else {
            if (eml && eml != "" && (eml.indexOf("@") != -1)) {
                var indexOfA = eml.indexOf("@"),
                name = eml.substring(0, indexOfA);
                if (name.length > 64 || eml.length > 254) {
                    return false;
                } else {
                    return eml.toLowerCase();
                }
            }
        }
        return false;
    },
    reMobile: reMobile,
    mobile: function(mob) {
        if (typeof mob != 'string') {
            return false;
        }
        this.trim && (mob = mob.trim());
        return this.reMobile(mob) ? mob : false;
    },
    rePassword: rePassword,
    password: function(pass) {
        if (typeof pass != 'string') {
            return false;
        }
        return this.rePassword(pass) ? pass : false;
    }
};

try {
    if (module && module.exports) {
        // for nodejs
        module.exports = Validator;
    }
} catch(e) {}