超级变态的前端密码强度校验

公司要求系统密码强度校验的需求为：
1，密码中要包括数字，特殊符号，大写字母，小写字母的组合
2，密码中不能包含 admin,root,password
3,不能有键盘三个以上的连续字符（包括三个）

function checkpwd(newpassword, flag) {
    //将密码转为大写
    var password = newpassword.toUpperCase();
    // 数字,特殊字符,大小写字母的匹配
    var boolean_num = false;
    var boolean_A = false;
    var boolean_a = false;
    var boolean_specialchar = false;
    for (var i = 0; i < newpassword.length; i++) {
        if (boolean_A == true && boolean_a == true && boolean_num == true
                && boolean_specialchar == true)
            break;
        if (newpassword[i].charCodeAt() >= 65
                && newpassword[i].charCodeAt() <= 90) {
            boolean_A = true;
            continue;
        }
        if (newpassword[i].charCodeAt() >= 48
                && newpassword[i].charCodeAt() <= 57) {
            boolean_num = true;
            continue;
        }
        if (newpassword[i].charCodeAt() >= 97
                && newpassword[i].charCodeAt() < 122) {
            boolean_a = true;
            continue;
        }
        if ((newpassword[i].charCodeAt() >= 33 && newpassword[i].charCodeAt() <= 47)
                || (newpassword[i].charCodeAt() >= 58 && newpassword[i]
                        .charCodeAt() <= 64)
                || (newpassword[i].charCodeAt() >= 91
                        && newpassword[i].charCodeAt() && newpassword[i]
                        .charCodeAt() <= 96)
                || (newpassword[i].charCodeAt() >= 123 && newpassword[i]
                        .charCodeAt() <= 127)) {
            boolean_specialchar = true;
            continue;
        }
    }
    if (boolean_A == false || boolean_a == false || boolean_num == false
            || boolean_specialchar == false) {
        if (flag == 0)
            alert("密码应该是数字、大小写字母、特殊字符的组合,请重新输入");
        if (flag == 1)
            alert("确认密码应该是数字、大小写字母、特殊字符的组合,请重新输入");
        return false;
    }
    // admin,root,password的匹配
    if (password.indexOf("ADMIN") >= 0 || newpassword.indexOf("ROOT") >= 0
            || password.indexOf("PASSWORD") >= 0) {
        if (flag == 0)
            alert("密码中不能包含admin、root、password（不区分大小写）");
        if (flag == 1)
            alert("确认密码中不能包含admin、root、password（不区分大小写）");
        return false;
    }

    // 键盘三个连续字符(包括三个连续数字)的匹配(横向、大小写、shift)
    var s_1_1 = "`1234567890-=";
    var s_1_2 = "qwertyuiop[]\\";
    var s_1_3 = "asdfghjkl;'";
    var s_1_4 = "zxcvbnm,./";
    var s_2_1 = "`1234567890-=";
    var s_2_2 = "QWERTYUIOP[]\\";
    var s_2_3 = "ASDFGHJKL;'";
    var s_2_4 = "ZXCVBNM,./";
    var s_3_1 = "~!@#$%^&*()_+";
    var s_3_2 = "QWERTYUIOP{}|";
    var s_3_3 = "ASDFGHJKL:\"";
    var s_3_4 = "ZXCVBNM<>?";
    var boolean = true;
    var boolean_nums = false;
    for (var n = 0; n < (newpassword.length - 2); n++) {
        var char = newpassword[n] + newpassword[n + 1] + newpassword[n + 2];
        if (char >= 0 && char <= 999) {
            boolean_nums = true;
            break;
        }
        if ((s_1_1.indexOf(char) >= 0) || (s_1_2.indexOf(char) >= 0)
                || (s_1_3.indexOf(char) >= 0) || (s_1_4.indexOf(char) >= 0)
                || (s_2_1.indexOf(char) >= 0) || (s_2_2.indexOf(char) >= 0)
                || (s_2_3.indexOf(char) >= 0) || (s_2_4.indexOf(char) >= 0)
                || (s_3_1.indexOf(char) >= 0) || (s_3_2.indexOf(char) >= 0)
                || (s_3_3.indexOf(char) >= 0) || (s_3_4.indexOf(char) >= 0)) {
            boolean = false;
            break;
        }
    }
    if (boolean_nums == true) {
        if (flag == 0)
            alert("密码中连续数字不能超过三个");
        if (flag == 1)
            alert("确认密码中连续数字不能超过三个");
        return false;
    }
    if (boolean == false) {
        if (flag == 0)
            alert("密码中键盘顺序字符不得超过三个,请重新输入");
        if (flag == 1)
            alert("确认密码中键盘顺序字符不得超过三个,请重新输入");
        return false;
    }
    return true;
}