Проверка логина/пароля на простоту

var kNoCanonicalCounterpart = 0;
var kCapitalLetter = 0;
var kSmallLetter = 1;
var kDigit = 2;
var kPunctuation = 3;
var kAlpha =  4;
var kCanonicalizeLettersOnly = true;
var kCananicalizeEverything = false;
var gSimilarityMap = new CSimilarityMap();


function CSimilarityMap(){
    this.m_elements = "";
    this.m_canonicalCounterparts = "";
}

function isctype(character, type){
var fResult = false;
    switch(type){
        case kCapitalLetter:
        if((character >= 'A') && (character <= 'Z')){
            fResult = true;
        }
        break;
        case kSmallLetter:
        if ((character >= 'a') && (character <= 'z')){
            fResult = true;
        }
        break;
        case kDigit:
        if ((character >= '0') && (character <= '9')){
            fResult = true;
        }
        break;
        case kPunctuation:
        if ("!@#$%^&*()_+-='\";:[{]}\|.>,</?`~".indexOf(character) >= 0){
            fResult = true;
        }
        break;
        case kAlpha:
        if (isctype(character, kCapitalLetter) || isctype(character, kSmallLetter)){
            fResult = true;
        }
        break;
        default:
        break;
    }
    return fResult;
}

function CharacterSetChecks(type, fResult){
    this.type = type;
    this.fResult = fResult;
}

function IsLongEnough(strWord, nAtLeastThisLong){
    if ((strWord == null) || isNaN(nAtLeastThisLong)){
        return false;
    }
    else if (strWord.length < nAtLeastThisLong){
        return false;
    }
    return true;
}

function SpansEnoughCharacterSets(strWord, nAtLeastThisMany){
    var nCharSets = 0;
    var characterSetChecks = new Array(
    new CharacterSetChecks(kCapitalLetter, false),
    new CharacterSetChecks(kSmallLetter, false),
    new CharacterSetChecks(kDigit, false),
    new CharacterSetChecks(kPunctuation, false)
    );
    if ((strWord == null) || isNaN(nAtLeastThisMany)){
        return false;
    }
    for(var index = 0; index < strWord.length; index++){
        for(var nCharSet = 0; nCharSet < characterSetChecks.length;nCharSet++){
            if (!characterSetChecks[nCharSet].fResult && isctype(strWord.charAt(index), characterSetChecks[nCharSet].type)){
                characterSetChecks[nCharSet].fResult = true;
                break;
            }
        }
    }
    for(var nCharSet = 0; nCharSet < characterSetChecks.length;nCharSet++){
        if (characterSetChecks[nCharSet].fResult){
            nCharSets++;
        }  
    }
    if (nCharSets < nAtLeastThisMany){
        return false;
    }
    return true;
}

function ClientSideStrongPassword(){
    return (IsLongEnough(ClientSideStrongPassword.arguments[0], "8") && SpansEnoughCharacterSets(ClientSideStrongPassword.arguments[0], "3"));
}

function ClientSideBestPassword(){
    return (IsLongEnough(ClientSideBestPassword.arguments[0], "14") && SpansEnoughCharacterSets(ClientSideBestPassword.arguments[0], "3"));
}

function ClientSideMediumPassword(){
    return (IsLongEnough(ClientSideMediumPassword.arguments[0], "8") && SpansEnoughCharacterSets(ClientSideMediumPassword.arguments[0], "2"));
}

function ClientSideWeakPassword(){
    return (IsLongEnough(ClientSideWeakPassword.arguments[0], "1") || (!(IsLongEnough(ClientSideWeakPassword.arguments[0], "0"))));
}


function DispPwdStrength(iN,sHL){
    if (iN>4) iN=4;

    var message = new Array ();
    message[0] = "Не известна";
    message[1] = "Слабая";
    message[2] = "Средняя";
    message[3] = "Высокая";
    message[4] = "Лучшая";

    document.getElementById("password_strength").innerHTML = message[iN];
    document.getElementById("password_strength").className = sHL;
}


function EvalPwdStrength(oF,sP){
    if(ClientSideBestPassword(sP,gSimilarityMap)){
        DispPwdStrength(4,'password_strength_good');
    }
    else if(ClientSideStrongPassword(sP,gSimilarityMap)){
        DispPwdStrength(3,'password_strength_good');
    }
    else if(ClientSideMediumPassword(sP,gSimilarityMap)){
        DispPwdStrength(2,'password_strength_bad');
    }
    else if(ClientSideWeakPassword(sP,gSimilarityMap)){
        DispPwdStrength(1,'password_strength_bad');
    }
    else{
        DispPwdStrength(0,'password_strength_neutral');
    }
}

&#111;&#110;keyup="EvalPwdStrength(document.forms[0], this.value);"