Function.prototype.createCallback = function() {
    var A = arguments; var B = this; return function() { return B.apply(window, A); };
}

Function.prototype.createDelegate = function(scope, arguments, appendArgs) {
    var D = this; return function() { var F = arguments || arguments; if (appendArgs === true) { F = Array.prototype.slice.call(arguments, 0); F = F.concat(arguments); } else { if (typeof appendArgs == "number") { F = Array.prototype.slice.call(arguments, 0); var E = [appendArgs, 0].concat(arguments); Array.prototype.splice.apply(F, E); } } return D.apply(scope || window, F); };
};

if (!this.w4u)
    this.w4u = {};

if (!this.w4u.util)
    this.w4u.util = {};

this.w4u.util.isArray = function(v) { return v && typeof v.length == "number" && typeof v.splice == "function" };
this.w4u.util.isDate = function(v) { return v && typeof v.getFullYear == "function" };

String.prototype.decode = function() {
    if (this == null) return;
    var sb = '';
    var len = this.length;
    for (var i = 0; i < len; i++) {
        var ch = this.charAt(i);
        if (ch == '&') {
            var semicolonIndex = this.indexOf(';', i + 1);
            if (semicolonIndex > 0) {
                var entity = this.substring(i + 1, semicolonIndex);
                if (entity.length > 1 && entity.charAt(0) == '#') {
                    if (entity.charAt(1) == 'x' || entity.charAt(1) == 'X')
                        ch = String.fromCharCode(eval('0' + entity.substring(1)));
                    else
                        ch = String.fromCharCode(eval(entity.substring(1)));
                }
                else {
                    switch (entity) {
                        case 'quot': ch = String.fromCharCode(0x0022); break;
                        case 'amp': ch = String.fromCharCode(0x0026); break;
                        case 'lt': ch = String.fromCharCode(0x003c); break;
                        case 'gt': ch = String.fromCharCode(0x003e); break;
                        case 'nbsp': ch = String.fromCharCode(0x00a0); break;
                        case 'iexcl': ch = String.fromCharCode(0x00a1); break;
                        case 'cent': ch = String.fromCharCode(0x00a2); break;
                        case 'pound': ch = String.fromCharCode(0x00a3); break;
                        case 'curren': ch = String.fromCharCode(0x00a4); break;
                        case 'yen': ch = String.fromCharCode(0x00a5); break;
                        case 'brvbar': ch = String.fromCharCode(0x00a6); break;
                        case 'sect': ch = String.fromCharCode(0x00a7); break;
                        case 'uml': ch = String.fromCharCode(0x00a8); break;
                        case 'copy': ch = String.fromCharCode(0x00a9); break;
                        case 'ordf': ch = String.fromCharCode(0x00aa); break;
                        case 'laquo': ch = String.fromCharCode(0x00ab); break;
                        case 'not': ch = String.fromCharCode(0x00ac); break;
                        case 'shy': ch = String.fromCharCode(0x00ad); break;
                        case 'reg': ch = String.fromCharCode(0x00ae); break;
                        case 'macr': ch = String.fromCharCode(0x00af); break;
                        case 'deg': ch = String.fromCharCode(0x00b0); break;
                        case 'plusmn': ch = String.fromCharCode(0x00b1); break;
                        case 'sup2': ch = String.fromCharCode(0x00b2); break;
                        case 'sup3': ch = String.fromCharCode(0x00b3); break;
                        case 'acute': ch = String.fromCharCode(0x00b4); break;
                        case 'micro': ch = String.fromCharCode(0x00b5); break;
                        case 'para': ch = String.fromCharCode(0x00b6); break;
                        case 'middot': ch = String.fromCharCode(0x00b7); break;
                        case 'cedil': ch = String.fromCharCode(0x00b8); break;
                        case 'sup1': ch = String.fromCharCode(0x00b9); break;
                        case 'ordm': ch = String.fromCharCode(0x00ba); break;
                        case 'raquo': ch = String.fromCharCode(0x00bb); break;
                        case 'frac14': ch = String.fromCharCode(0x00bc); break;
                        case 'frac12': ch = String.fromCharCode(0x00bd); break;
                        case 'frac34': ch = String.fromCharCode(0x00be); break;
                        case 'iquest': ch = String.fromCharCode(0x00bf); break;
                        case 'Agrave': ch = String.fromCharCode(0x00c0); break;
                        case 'Aacute': ch = String.fromCharCode(0x00c1); break;
                        case 'Acirc': ch = String.fromCharCode(0x00c2); break;
                        case 'Atilde': ch = String.fromCharCode(0x00c3); break;
                        case 'Auml': ch = String.fromCharCode(0x00c4); break;
                        case 'Aring': ch = String.fromCharCode(0x00c5); break;
                        case 'AElig': ch = String.fromCharCode(0x00c6); break;
                        case 'Ccedil': ch = String.fromCharCode(0x00c7); break;
                        case 'Egrave': ch = String.fromCharCode(0x00c8); break;
                        case 'Eacute': ch = String.fromCharCode(0x00c9); break;
                        case 'Ecirc': ch = String.fromCharCode(0x00ca); break;
                        case 'Euml': ch = String.fromCharCode(0x00cb); break;
                        case 'Igrave': ch = String.fromCharCode(0x00cc); break;
                        case 'Iacute': ch = String.fromCharCode(0x00cd); break;
                        case 'Icirc': ch = String.fromCharCode(0x00ce); break;
                        case 'Iuml': ch = String.fromCharCode(0x00cf); break;
                        case 'ETH': ch = String.fromCharCode(0x00d0); break;
                        case 'Ntilde': ch = String.fromCharCode(0x00d1); break;
                        case 'Ograve': ch = String.fromCharCode(0x00d2); break;
                        case 'Oacute': ch = String.fromCharCode(0x00d3); break;
                        case 'Ocirc': ch = String.fromCharCode(0x00d4); break;
                        case 'Otilde': ch = String.fromCharCode(0x00d5); break;
                        case 'Ouml': ch = String.fromCharCode(0x00d6); break;
                        case 'times': ch = String.fromCharCode(0x00d7); break;
                        case 'Oslash': ch = String.fromCharCode(0x00d8); break;
                        case 'Ugrave': ch = String.fromCharCode(0x00d9); break;
                        case 'Uacute': ch = String.fromCharCode(0x00da); break;
                        case 'Ucirc': ch = String.fromCharCode(0x00db); break;
                        case 'Uuml': ch = String.fromCharCode(0x00dc); break;
                        case 'Yacute': ch = String.fromCharCode(0x00dd); break;
                        case 'THORN': ch = String.fromCharCode(0x00de); break;
                        case 'szlig': ch = String.fromCharCode(0x00df); break;
                        case 'agrave': ch = String.fromCharCode(0x00e0); break;
                        case 'aacute': ch = String.fromCharCode(0x00e1); break;
                        case 'acirc': ch = String.fromCharCode(0x00e2); break;
                        case 'atilde': ch = String.fromCharCode(0x00e3); break;
                        case 'auml': ch = String.fromCharCode(0x00e4); break;
                        case 'aring': ch = String.fromCharCode(0x00e5); break;
                        case 'aelig': ch = String.fromCharCode(0x00e6); break;
                        case 'ccedil': ch = String.fromCharCode(0x00e7); break;
                        case 'egrave': ch = String.fromCharCode(0x00e8); break;
                        case 'eacute': ch = String.fromCharCode(0x00e9); break;
                        case 'ecirc': ch = String.fromCharCode(0x00ea); break;
                        case 'euml': ch = String.fromCharCode(0x00eb); break;
                        case 'igrave': ch = String.fromCharCode(0x00ec); break;
                        case 'iacute': ch = String.fromCharCode(0x00ed); break;
                        case 'icirc': ch = String.fromCharCode(0x00ee); break;
                        case 'iuml': ch = String.fromCharCode(0x00ef); break;
                        case 'eth': ch = String.fromCharCode(0x00f0); break;
                        case 'ntilde': ch = String.fromCharCode(0x00f1); break;
                        case 'ograve': ch = String.fromCharCode(0x00f2); break;
                        case 'oacute': ch = String.fromCharCode(0x00f3); break;
                        case 'ocirc': ch = String.fromCharCode(0x00f4); break;
                        case 'otilde': ch = String.fromCharCode(0x00f5); break;
                        case 'ouml': ch = String.fromCharCode(0x00f6); break;
                        case 'divide': ch = String.fromCharCode(0x00f7); break;
                        case 'oslash': ch = String.fromCharCode(0x00f8); break;
                        case 'ugrave': ch = String.fromCharCode(0x00f9); break;
                        case 'uacute': ch = String.fromCharCode(0x00fa); break;
                        case 'ucirc': ch = String.fromCharCode(0x00fb); break;
                        case 'uuml': ch = String.fromCharCode(0x00fc); break;
                        case 'yacute': ch = String.fromCharCode(0x00fd); break;
                        case 'thorn': ch = String.fromCharCode(0x00fe); break;
                        case 'yuml': ch = String.fromCharCode(0x00ff); break;
                        case 'OElig': ch = String.fromCharCode(0x0152); break;
                        case 'oelig': ch = String.fromCharCode(0x0153); break;
                        case 'Scaron': ch = String.fromCharCode(0x0160); break;
                        case 'scaron': ch = String.fromCharCode(0x0161); break;
                        case 'Yuml': ch = String.fromCharCode(0x0178); break;
                        case 'fnof': ch = String.fromCharCode(0x0192); break;
                        case 'circ': ch = String.fromCharCode(0x02c6); break;
                        case 'tilde': ch = String.fromCharCode(0x02dc); break;
                        case 'Alpha': ch = String.fromCharCode(0x0391); break;
                        case 'Beta': ch = String.fromCharCode(0x0392); break;
                        case 'Gamma': ch = String.fromCharCode(0x0393); break;
                        case 'Delta': ch = String.fromCharCode(0x0394); break;
                        case 'Epsilon': ch = String.fromCharCode(0x0395); break;
                        case 'Zeta': ch = String.fromCharCode(0x0396); break;
                        case 'Eta': ch = String.fromCharCode(0x0397); break;
                        case 'Theta': ch = String.fromCharCode(0x0398); break;
                        case 'Iota': ch = String.fromCharCode(0x0399); break;
                        case 'Kappa': ch = String.fromCharCode(0x039a); break;
                        case 'Lambda': ch = String.fromCharCode(0x039b); break;
                        case 'Mu': ch = String.fromCharCode(0x039c); break;
                        case 'Nu': ch = String.fromCharCode(0x039d); break;
                        case 'Xi': ch = String.fromCharCode(0x039e); break;
                        case 'Omicron': ch = String.fromCharCode(0x039f); break;
                        case 'Pi': ch = String.fromCharCode(0x03a0); break;
                        case ' Rho ': ch = String.fromCharCode(0x03a1); break;
                        case 'Sigma': ch = String.fromCharCode(0x03a3); break;
                        case 'Tau': ch = String.fromCharCode(0x03a4); break;
                        case 'Upsilon': ch = String.fromCharCode(0x03a5); break;
                        case 'Phi': ch = String.fromCharCode(0x03a6); break;
                        case 'Chi': ch = String.fromCharCode(0x03a7); break;
                        case 'Psi': ch = String.fromCharCode(0x03a8); break;
                        case 'Omega': ch = String.fromCharCode(0x03a9); break;
                        case 'alpha': ch = String.fromCharCode(0x03b1); break;
                        case 'beta': ch = String.fromCharCode(0x03b2); break;
                        case 'gamma': ch = String.fromCharCode(0x03b3); break;
                        case 'delta': ch = String.fromCharCode(0x03b4); break;
                        case 'epsilon': ch = String.fromCharCode(0x03b5); break;
                        case 'zeta': ch = String.fromCharCode(0x03b6); break;
                        case 'eta': ch = String.fromCharCode(0x03b7); break;
                        case 'theta': ch = String.fromCharCode(0x03b8); break;
                        case 'iota': ch = String.fromCharCode(0x03b9); break;
                        case 'kappa': ch = String.fromCharCode(0x03ba); break;
                        case 'lambda': ch = String.fromCharCode(0x03bb); break;
                        case 'mu': ch = String.fromCharCode(0x03bc); break;
                        case 'nu': ch = String.fromCharCode(0x03bd); break;
                        case 'xi': ch = String.fromCharCode(0x03be); break;
                        case 'omicron': ch = String.fromCharCode(0x03bf); break;
                        case 'pi': ch = String.fromCharCode(0x03c0); break;
                        case 'rho': ch = String.fromCharCode(0x03c1); break;
                        case 'sigmaf': ch = String.fromCharCode(0x03c2); break;
                        case 'sigma': ch = String.fromCharCode(0x03c3); break;
                        case 'tau': ch = String.fromCharCode(0x03c4); break;
                        case 'upsilon': ch = String.fromCharCode(0x03c5); break;
                        case 'phi': ch = String.fromCharCode(0x03c6); break;
                        case 'chi': ch = String.fromCharCode(0x03c7); break;
                        case 'psi': ch = String.fromCharCode(0x03c8); break;
                        case 'omega': ch = String.fromCharCode(0x03c9); break;
                        case 'thetasym': ch = String.fromCharCode(0x03d1); break;
                        case 'upsih': ch = String.fromCharCode(0x03d2); break;
                        case 'piv': ch = String.fromCharCode(0x03d6); break;
                        case 'ensp': ch = String.fromCharCode(0x2002); break;
                        case 'emsp': ch = String.fromCharCode(0x2003); break;
                        case 'thinsp': ch = String.fromCharCode(0x2009); break;
                        case 'zwnj': ch = String.fromCharCode(0x200c); break;
                        case 'zwj': ch = String.fromCharCode(0x200d); break;
                        case 'lrm': ch = String.fromCharCode(0x200e); break;
                        case 'rlm': ch = String.fromCharCode(0x200f); break;
                        case 'ndash': ch = String.fromCharCode(0x2013); break;
                        case 'mdash': ch = String.fromCharCode(0x2014); break;
                        case 'lsquo': ch = String.fromCharCode(0x2018); break;
                        case 'rsquo': ch = String.fromCharCode(0x2019); break;
                        case 'sbquo': ch = String.fromCharCode(0x201a); break;
                        case 'ldquo': ch = String.fromCharCode(0x201c); break;
                        case 'rdquo': ch = String.fromCharCode(0x201d); break;
                        case 'bdquo': ch = String.fromCharCode(0x201e); break;
                        case 'dagger': ch = String.fromCharCode(0x2020); break;
                        case 'Dagger': ch = String.fromCharCode(0x2021); break;
                        case 'bull': ch = String.fromCharCode(0x2022); break;
                        case 'hellip': ch = String.fromCharCode(0x2026); break;
                        case 'permil': ch = String.fromCharCode(0x2030); break;
                        case 'prime': ch = String.fromCharCode(0x2032); break;
                        case 'Prime': ch = String.fromCharCode(0x2033); break;
                        case 'lsaquo': ch = String.fromCharCode(0x2039); break;
                        case 'rsaquo': ch = String.fromCharCode(0x203a); break;
                        case 'oline': ch = String.fromCharCode(0x203e); break;
                        case 'frasl': ch = String.fromCharCode(0x2044); break;
                        case 'euro': ch = String.fromCharCode(0x20ac); break;
                        case 'image': ch = String.fromCharCode(0x2111); break;
                        case 'weierp': ch = String.fromCharCode(0x2118); break;
                        case 'real': ch = String.fromCharCode(0x211c); break;
                        case 'trade': ch = String.fromCharCode(0x2122); break;
                        case 'alefsym': ch = String.fromCharCode(0x2135); break;
                        case 'larr': ch = String.fromCharCode(0x2190); break;
                        case 'uarr': ch = String.fromCharCode(0x2191); break;
                        case 'rarr': ch = String.fromCharCode(0x2192); break;
                        case 'darr': ch = String.fromCharCode(0x2193); break;
                        case 'harr': ch = String.fromCharCode(0x2194); break;
                        case 'crarr': ch = String.fromCharCode(0x21b5); break;
                        case 'lArr': ch = String.fromCharCode(0x21d0); break;
                        case 'uArr': ch = String.fromCharCode(0x21d1); break;
                        case 'rArr': ch = String.fromCharCode(0x21d2); break;
                        case 'dArr': ch = String.fromCharCode(0x21d3); break;
                        case 'hArr': ch = String.fromCharCode(0x21d4); break;
                        case 'forall': ch = String.fromCharCode(0x2200); break;
                        case 'part': ch = String.fromCharCode(0x2202); break;
                        case 'exist': ch = String.fromCharCode(0x2203); break;
                        case 'empty': ch = String.fromCharCode(0x2205); break;
                        case 'nabla': ch = String.fromCharCode(0x2207); break;
                        case 'isin': ch = String.fromCharCode(0x2208); break;
                        case 'notin': ch = String.fromCharCode(0x2209); break;
                        case 'ni': ch = String.fromCharCode(0x220b); break;
                        case 'prod': ch = String.fromCharCode(0x220f); break;
                        case 'sum': ch = String.fromCharCode(0x2211); break;
                        case 'minus': ch = String.fromCharCode(0x2212); break;
                        case 'lowast': ch = String.fromCharCode(0x2217); break;
                        case 'radic': ch = String.fromCharCode(0x221a); break;
                        case 'prop': ch = String.fromCharCode(0x221d); break;
                        case 'infin': ch = String.fromCharCode(0x221e); break;
                        case 'ang': ch = String.fromCharCode(0x2220); break;
                        case 'and': ch = String.fromCharCode(0x2227); break;
                        case 'or': ch = String.fromCharCode(0x2228); break;
                        case 'cap': ch = String.fromCharCode(0x2229); break;
                        case 'cup': ch = String.fromCharCode(0x222a); break;
                        case 'int': ch = String.fromCharCode(0x222b); break;
                        case 'there4': ch = String.fromCharCode(0x2234); break;
                        case 'sim': ch = String.fromCharCode(0x223c); break;
                        case 'cong': ch = String.fromCharCode(0x2245); break;
                        case 'asymp': ch = String.fromCharCode(0x2248); break;
                        case 'ne': ch = String.fromCharCode(0x2260); break;
                        case 'equiv': ch = String.fromCharCode(0x2261); break;
                        case 'le': ch = String.fromCharCode(0x2264); break;
                        case 'ge': ch = String.fromCharCode(0x2265); break;
                        case 'sub': ch = String.fromCharCode(0x2282); break;
                        case 'sup': ch = String.fromCharCode(0x2283); break;
                        case 'nsub': ch = String.fromCharCode(0x2284); break;
                        case 'sube': ch = String.fromCharCode(0x2286); break;
                        case 'supe': ch = String.fromCharCode(0x2287); break;
                        case 'oplus': ch = String.fromCharCode(0x2295); break;
                        case 'otimes': ch = String.fromCharCode(0x2297); break;
                        case 'perp': ch = String.fromCharCode(0x22a5); break;
                        case 'sdot': ch = String.fromCharCode(0x22c5); break;
                        case 'lceil': ch = String.fromCharCode(0x2308); break;
                        case 'rceil': ch = String.fromCharCode(0x2309); break;
                        case 'lfloor': ch = String.fromCharCode(0x230a); break;
                        case 'rfloor': ch = String.fromCharCode(0x230b); break;
                        case 'lang': ch = String.fromCharCode(0x2329); break;
                        case 'rang': ch = String.fromCharCode(0x232a); break;
                        case 'loz': ch = String.fromCharCode(0x25ca); break;
                        case 'spades': ch = String.fromCharCode(0x2660); break;
                        case 'clubs': ch = String.fromCharCode(0x2663); break;
                        case 'hearts': ch = String.fromCharCode(0x2665); break;
                        case 'diams': ch = String.fromCharCode(0x2666); break;
                        default: ch = ''; break;
                    }
                }
                i = semicolonIndex;
            }
        }
        sb += ch;
    }
    return sb;
};

this.w4u.util.JSON = new (function() {
    var useHasOwn = !!{}.hasOwnProperty;

    var pad = function(n) {
        return n < 10 ? "0" + n : n;
    };

    var m = {
        "\b": '\\b',
        "\t": '\\t',
        "\n": '\\n',
        "\f": '\\f',
        "\r": '\\r',
        '"': '\\"',
        "\\": '\\\\'
    };

    var encodeString = function(s) {
        if (/["\\\x00-\x1f]/.test(s)) {
            return '"' + s.replace(/([\x00-\x1f\\"])/g, function(a, b) {
                var c = m[b];
                if (c) {
                    return c;
                }
                c = b.charCodeAt();
                return "\\u00" +
                    Math.floor(c / 16).toString(16) +
                    (c % 16).toString(16);
            }) + '"';
        }
        return '"' + s + '"';
    };

    var encodeArray = function(o) {
        var a = ["["], b, i, l = o.length, v;
        for (i = 0; i < l; i += 1) {
            v = o[i];
            switch (typeof v) {
                case "undefined":
                case "function":
                case "unknown":
                    break;
                default:
                    if (b) {
                        a.push(',');
                    }
                    a.push(v === null ? "null" : w4u.util.JSON.encode(v));
                    b = true;
            }
        }
        a.push("]");
        return a.join("");
    };

    this.encodeDate = function(o) {
        return '"' + o.getFullYear() + "-" +
                pad(o.getMonth() + 1) + "-" +
                pad(o.getDate()) + "T" +
                pad(o.getHours()) + ":" +
                pad(o.getMinutes()) + ":" +
                pad(o.getSeconds()) + '"';
    };


    this.encode = function(o) {
        if (typeof o == "undefined" || o === null) {
            return "null";
        } else if (w4u.util.isArray(o)) {
            return encodeArray(o);
        } else if (w4u.util.isDate(o)) {
            return w4u.util.JSON.encodeDate(o);
        } else if (typeof o == "string") {
            return encodeString(o);
        } else if (typeof o == "number") {
            return isFinite(o) ? String(o) : "null";
        } else if (typeof o == "boolean") {
            return String(o);
        } else {
            var a = ["{"], b, i, v;
            for (i in o) {
                if (!useHasOwn || o.hasOwnProperty === undefined || o.hasOwnProperty(i)) {
                    v = o[i];
                    switch (typeof v) {
                        case "undefined":
                        case "function":
                        case "unknown":
                            break;
                        default:
                            if (b) {
                                a.push(',');
                            }
                            a.push(this.encode(i), ":",
                                v === null ? "null" : this.encode(v));
                            b = true;
                    }
                }
            }
            a.push("}");
            return a.join("");
        }
    };

    this.decode = function(json) {
        return eval("(" + json + ')');
    };
})();

if (!this.w4u.crypto)
    this.w4u.crypto = {};

this.w4u.crypto.SHA1 = function() {
    var f = function(s, x, y, z) {
        switch (s) {
            case 0: return (x & y) ^ (~x & z);           // Ch()
            case 1: return x ^ y ^ z;                    // Parity()
            case 2: return (x & y) ^ (x & z) ^ (y & z);  // Maj()
            case 3: return x ^ y ^ z;                    // Parity()
        }
    };
    
    // rotate left (circular left shift) value x by n positions [§3.2.5]
    var ROTL = function(x, n) {
        return (x << n) | (x >>> (32 - n));
    };
    return {
        hash: function(msg) {
            // constants [§4.2.1]
            var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6], i;


            // PREPROCESSING 

            msg += String.fromCharCode(0x80); // add trailing '1' bit to string [§5.1.1]

            // convert string msg into 512-bit/16-integer blocks arrays of ints [§5.2.1]
            var l = Math.ceil(msg.length / 4) + 2;  // long enough to contain msg plus 2-word length
            var N = Math.ceil(l / 16);              // in N 16-int blocks
            var M = [];
            for (i = 0; i < N; i++) {
                M[i] = [];
                for (var j = 0; j < 16; j++) {  // encode 4 chars per integer, big-endian encoding
                    M[i][j] = (msg.charCodeAt(i * 64 + j * 4) << 24) | (msg.charCodeAt(i * 64 + j * 4 + 1) << 16) |
                        (msg.charCodeAt(i * 64 + j * 4 + 2) << 8) | (msg.charCodeAt(i * 64 + j * 4 + 3));
                }
            }
            // add length (in bits) into final pair of 32-bit integers (big-endian) [5.1.1]
            // note: most significant word would be ((len-1)*8 >>> 32, but since JS converts
            // bitwise-op args to 32 bits, we need to simulate this by arithmetic operators
            M[N - 1][14] = ((msg.length - 1) * 8) / Math.pow(2, 32); M[N - 1][14] = Math.floor(M[N - 1][14]);
            M[N - 1][15] = ((msg.length - 1) * 8) & 0xffffffff;

            // set initial hash value [§5.3.1]
            var H0 = 0x67452301;
            var H1 = 0xefcdab89;
            var H2 = 0x98badcfe;
            var H3 = 0x10325476;
            var H4 = 0xc3d2e1f0;

            // HASH COMPUTATION [§6.1.2]

            var W = []; var a, b, c, d, e, t;
            for (i = 0; i < N; i++) {

                // 1 - prepare message schedule 'W'
                for (t = 0; t < 16; t++) {
                    W[t] = M[i][t];
                }

                for (t = 16; t < 80; t++) {
                    W[t] = ROTL(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1);
                }

                // 2 - initialise five working variables a, b, c, d, e with previous hash value
                a = H0; b = H1; c = H2; d = H3; e = H4;

                // 3 - main loop
                for (t = 0; t < 80; t++) {
                    var s = Math.floor(t / 20); // seq for blocks of 'f' functions and 'K' constants
                    var T = (ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[t]) & 0xffffffff;
                    e = d;
                    d = c;
                    c = ROTL(b, 30);
                    b = a;
                    a = T;
                }

                // 4 - compute the new intermediate hash value
                H0 = (H0 + a) & 0xffffffff;  // note 'addition modulo 2^32'
                H1 = (H1 + b) & 0xffffffff;
                H2 = (H2 + c) & 0xffffffff;
                H3 = (H3 + d) & 0xffffffff;
                H4 = (H4 + e) & 0xffffffff;
            }

            return H0.toHexStr() + H1.toHexStr() + H2.toHexStr() + H3.toHexStr() + H4.toHexStr();
        }
    };

} ();

Number.prototype.toHexStr = function() {
    var s = '', v;
    for (var i = 7; i >= 0; i--) {
        v = (this >>> (i * 4)) & 0xf;
        s += v.toString(16);
    }
    return s;
}
