(function(){
    var csrfToken = $("meta[name='_zc_csrf_token']").attr("content");
    var reqCntCookieName = 'c';
    $(function(){
        var jsSignInfoStr = $('#J_jsSI').val();

        var jsSignInfo = jsSignInfoStr.split('_');
        var curJsLoadTime = jsSignInfo[0];
        var currVersion = jsSignInfo[1];
        var currJsToken = jsSignInfo[2];
        if (!currVersion) {
            currVersion = 1;
        }
        var curUserAgent = navigator.userAgent;
        var curServeTimeSpan = (new Date()).getTime() - curJsLoadTime;
        if (csrfToken) {
            initReqTraceInfo();
            $(document).ajaxSend(function(e, xhr, options) {
                attachReqTraceInfo(currVersion, curJsLoadTime, curServeTimeSpan, curUserAgent, currJsToken);
            });
        }
    });

    function initReqTraceInfo() {
        setCookie(reqCntCookieName, 0);
    }

    function attachReqTraceInfo(currVersion, curJsLoadTime, curServeTimeSpan, curUserAgent, currJsToken) {
        var	currServeTime = (new Date()).getTime() - curServeTimeSpan;
        var reqCnt = getCookie(reqCntCookieName) || 0;
        reqCnt++;
        setCookie(reqCntCookieName, reqCnt);

        var signStr = currVersion + '&' + curJsLoadTime + '&' + currServeTime + '&' + reqCnt;
        var rs = mkSign(signStr);
        var reqSign = currVersion + '_' + curJsLoadTime + '_' + currServeTime + '_' + reqCnt + '_' + rs;

        setCookie(currJsToken, reqSign);
        return reqSign;
    }

    function getCookie(name) {
        var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
        if(arr=document.cookie.match(reg))
            return unescape(arr[2]);
        else
            return null;
    }

    function setCookie(name,value) {
        var Days = 30;
        var exp = new Date();
        exp.setTime(exp.getTime() + Days*24*60*60*1000);
        document.cookie = name + "="+ escape (value) + ";path=/;expires=" + exp.toGMTString();
    }

    function mkSign(mkSignstr) {
        var buildSignString = function(string) {
            var x = Array()
            var k, AA, BB, CC, DD, a, b, c, d
            var S11 = 7,
                S12 = 12,
                S13 = 17,
                S14 = 22
            var S21 = 5,
                S22 = 9,
                S23 = 14,
                S24 = 20
            var S31 = 4,
                S32 = 11,
                S33 = 16,
                S34 = 23
            var S41 = 6,
                S42 = 10,
                S43 = 15,
                S44 = 21
            string = uTF8Encode(string)
            x = convertToWordArray(string)
            a = 0x67452301
            b = 0xEFCDAB89
            c = 0x98BADCFE
            d = 0x10325476
            for (k = 0; k < x.length; k += 16) {
                AA = a
                BB = b
                CC = c
                DD = d
                a = FF(a, b, c, d, x[k + 0], S11, 0xD76AA478)
                d = FF(d, a, b, c, x[k + 1], S12, 0xE8C7B756)
                c = FF(c, d, a, b, x[k + 2], S13, 0x242070DB)
                b = FF(b, c, d, a, x[k + 3], S14, 0xC1BDCEEE)
                a = FF(a, b, c, d, x[k + 4], S11, 0xF57C0FAF)
                d = FF(d, a, b, c, x[k + 5], S12, 0x4787C62A)
                c = FF(c, d, a, b, x[k + 6], S13, 0xA8304613)
                b = FF(b, c, d, a, x[k + 7], S14, 0xFD469501)
                a = FF(a, b, c, d, x[k + 8], S11, 0x698098D8)
                d = FF(d, a, b, c, x[k + 9], S12, 0x8B44F7AF)
                c = FF(c, d, a, b, x[k + 10], S13, 0xFFFF5BB1)
                b = FF(b, c, d, a, x[k + 11], S14, 0x895CD7BE)
                a = FF(a, b, c, d, x[k + 12], S11, 0x6B901122)
                d = FF(d, a, b, c, x[k + 13], S12, 0xFD987193)
                c = FF(c, d, a, b, x[k + 14], S13, 0xA679438E)
                b = FF(b, c, d, a, x[k + 15], S14, 0x49B40821)
                a = GG(a, b, c, d, x[k + 1], S21, 0xF61E2562)
                d = GG(d, a, b, c, x[k + 6], S22, 0xC040B340)
                c = GG(c, d, a, b, x[k + 11], S23, 0x265E5A51)
                b = GG(b, c, d, a, x[k + 0], S24, 0xE9B6C7AA)
                a = GG(a, b, c, d, x[k + 5], S21, 0xD62F105D)
                d = GG(d, a, b, c, x[k + 10], S22, 0x2441453)
                c = GG(c, d, a, b, x[k + 15], S23, 0xD8A1E681)
                b = GG(b, c, d, a, x[k + 4], S24, 0xE7D3FBC8)
                a = GG(a, b, c, d, x[k + 9], S21, 0x21E1CDE6)
                d = GG(d, a, b, c, x[k + 14], S22, 0xC33707D6)
                c = GG(c, d, a, b, x[k + 3], S23, 0xF4D50D87)
                b = GG(b, c, d, a, x[k + 8], S24, 0x455A14ED)
                a = GG(a, b, c, d, x[k + 13], S21, 0xA9E3E905)
                d = GG(d, a, b, c, x[k + 2], S22, 0xFCEFA3F8)
                c = GG(c, d, a, b, x[k + 7], S23, 0x676F02D9)
                b = GG(b, c, d, a, x[k + 12], S24, 0x8D2A4C8A)
                a = HH(a, b, c, d, x[k + 5], S31, 0xFFFA3942)
                d = HH(d, a, b, c, x[k + 8], S32, 0x8771F681)
                c = HH(c, d, a, b, x[k + 11], S33, 0x6D9D6122)
                b = HH(b, c, d, a, x[k + 14], S34, 0xFDE5380C)
                a = HH(a, b, c, d, x[k + 1], S31, 0xA4BEEA44)
                d = HH(d, a, b, c, x[k + 4], S32, 0x4BDECFA9)
                c = HH(c, d, a, b, x[k + 7], S33, 0xF6BB4B60)
                b = HH(b, c, d, a, x[k + 10], S34, 0xBEBFBC70)
                a = HH(a, b, c, d, x[k + 13], S31, 0x289B7EC6)
                d = HH(d, a, b, c, x[k + 0], S32, 0xEAA127FA)
                c = HH(c, d, a, b, x[k + 3], S33, 0xD4EF3085)
                b = HH(b, c, d, a, x[k + 6], S34, 0x4881D05)
                a = HH(a, b, c, d, x[k + 9], S31, 0xD9D4D039)
                d = HH(d, a, b, c, x[k + 12], S32, 0xE6DB99E5)
                c = HH(c, d, a, b, x[k + 15], S33, 0x1FA27CF8)
                b = HH(b, c, d, a, x[k + 2], S34, 0xC4AC5665)
                a = II(a, b, c, d, x[k + 0], S41, 0xF4292244)
                d = II(d, a, b, c, x[k + 7], S42, 0x432AFF97)
                c = II(c, d, a, b, x[k + 14], S43, 0xAB9423A7)
                b = II(b, c, d, a, x[k + 5], S44, 0xFC93A039)
                a = II(a, b, c, d, x[k + 12], S41, 0x655B59C3)
                d = II(d, a, b, c, x[k + 3], S42, 0x8F0CCC92)
                c = II(c, d, a, b, x[k + 10], S43, 0xFFEFF47D)
                b = II(b, c, d, a, x[k + 1], S44, 0x85845DD1)
                a = II(a, b, c, d, x[k + 8], S41, 0x6FA87E4F)
                d = II(d, a, b, c, x[k + 15], S42, 0xFE2CE6E0)
                c = II(c, d, a, b, x[k + 6], S43, 0xA3014314)
                b = II(b, c, d, a, x[k + 13], S44, 0x4E0811A1)
                a = II(a, b, c, d, x[k + 4], S41, 0xF7537E82)
                d = II(d, a, b, c, x[k + 11], S42, 0xBD3AF235)
                c = II(c, d, a, b, x[k + 2], S43, 0x2AD7D2BB)
                b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391)
                a = addUnsigned(a, AA)
                b = addUnsigned(b, BB)
                c = addUnsigned(c, CC)
                d = addUnsigned(d, DD)
            }
            var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d)
            return tempValue.toLowerCase()
        }
        var rotateLeft = function(lValue, iShiftBits) {
            return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits))
        }
        var addUnsigned = function(lX, lY) {
            var lX4, lY4, lX8, lY8, lResult
            lX8 = (lX & 0x80000000)
            lY8 = (lY & 0x80000000)
            lX4 = (lX & 0x40000000)
            lY4 = (lY & 0x40000000)
            lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF)
            if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8)
            if (lX4 | lY4) {
                if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8)
                else return (lResult ^ 0x40000000 ^ lX8 ^ lY8)
            } else {
                return (lResult ^ lX8 ^ lY8)
            }
        }
        var F = function(x, y, z) {
            return (x & y) | ((~x) & z)
        }
        var G = function(x, y, z) {
            return (x & z) | (y & (~z))
        }
        var H = function(x, y, z) {
            return (x ^ y ^ z)
        }
        var I = function(x, y, z) {
            return (y ^ (x | (~z)))
        }
        var FF = function(a, b, c, d, x, s, ac) {
            a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac))
            return addUnsigned(rotateLeft(a, s), b)
        }
        var GG = function(a, b, c, d, x, s, ac) {
            a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac))
            return addUnsigned(rotateLeft(a, s), b)
        }
        var HH = function(a, b, c, d, x, s, ac) {
            a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac))
            return addUnsigned(rotateLeft(a, s), b)
        }
        var II = function(a, b, c, d, x, s, ac) {
            a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac))
            return addUnsigned(rotateLeft(a, s), b)
        }
        var convertToWordArray = function(string) {
            var lWordCount
            var lMessageLength = string.length
            var lNumberOfWordsTempOne = lMessageLength + 8
            var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64
            var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16
            var lWordArray = Array(lNumberOfWords - 1)
            var lBytePosition = 0
            var lByteCount = 0
            while (lByteCount < lMessageLength) {
                lWordCount = (lByteCount - (lByteCount % 4)) / 4
                lBytePosition = (lByteCount % 4) * 8
                lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition))
                lByteCount++
            }
            lWordCount = (lByteCount - (lByteCount % 4)) / 4
            lBytePosition = (lByteCount % 4) * 8
            lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition)
            lWordArray[lNumberOfWords - 2] = lMessageLength << 3
            lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29
            return lWordArray
        }
        var wordToHex = function(lValue) {
            var WordToHexValue = '',
                WordToHexValueTemp = '',
                lByte, lCount
            for (lCount = 0; lCount <= 3; lCount++) {
                lByte = (lValue >>> (lCount * 8)) & 255
                WordToHexValueTemp = '0' + lByte.toString(16)
                WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2)
            }
            return WordToHexValue
        }
        var uTF8Encode = function(string) {
            string = string.toString().replace(/\x0d\x0a/g, '\x0a')
            var output = ''
            for (var n = 0; n < string.length; n++) {
                var c = string.charCodeAt(n)
                if (c < 128) {
                    output += String.fromCharCode(c)
                } else if ((c > 127) && (c < 2048)) {
                    output += String.fromCharCode((c >> 6) | 192)
                    output += String.fromCharCode((c & 63) | 128)
                } else {
                    output += String.fromCharCode((c >> 12) | 224)
                    output += String.fromCharCode(((c >> 6) & 63) | 128)
                    output += String.fromCharCode((c & 63) | 128)
                }
            }
            return output
        }

        return buildSignString(buildSignString(mkSignstr).substr(8, 16));
    }
})();