jquery密码强度判断特效

jquery密码强度智能判断特效是一款非常实用的jquery特效，基本上每个有会员模块的网站都可用上，可以提示会员注册时输入的密码强度，主要用到了keyup事件。

      $('#tbPassword').focus(function () {
            $('#pwdLevel_1').attr('class', 'ywz_zhuce_hongxian');
            $('#tbPassword').keyup();
        });

        $('#tbPassword').keyup(function () {
            var __th = $(this);

            if (!__th.val()) {
                $('#pwd_tip').hide();
                $('#pwd_err').show();
                Primary();
                return;
            }
            if (__th.val().length < 6) {
                $('#pwd_tip').hide();
                $('#pwd_err').show();
                Weak();
                return;
            }
            var _r = checkPassword(__th);
            if (_r < 1) {
                $('#pwd_tip').hide();
                $('#pwd_err').show();
                Primary();
                return;
            }

            if (_r > 0 && _r < 2) {
                Weak();
            } else if (_r >= 2 && _r < 4) {
                Medium();
            } else if (_r >= 4) {
                Tough();
            }

            $('#pwd_tip').hide();
            $('#pwd_err').hide();
        });

     

        function Primary() {
            $('#pwdLevel_1').attr('class', 'ywz_zhuce_huixian');
            $('#pwdLevel_2').attr('class', 'ywz_zhuce_huixian');
            $('#pwdLevel_3').attr('class', 'ywz_zhuce_huixian');
        }

        function Weak() {
            $('#pwdLevel_1').attr('class', 'ywz_zhuce_hongxian');
            $('#pwdLevel_2').attr('class', 'ywz_zhuce_huixian');
            $('#pwdLevel_3').attr('class', 'ywz_zhuce_huixian');
        }

        function Medium() {
            $('#pwdLevel_1').attr('class', 'ywz_zhuce_hongxian');
            $('#pwdLevel_2').attr('class', 'ywz_zhuce_hongxian2');
            $('#pwdLevel_3').attr('class', 'ywz_zhuce_huixian');
        }

        function Tough() {
            $('#pwdLevel_1').attr('class', 'ywz_zhuce_hongxian');
            $('#pwdLevel_2').attr('class', 'ywz_zhuce_hongxian2');
            $('#pwdLevel_3').attr('class', 'ywz_zhuce_hongxian3');
        }




        function checkPassword(pwdinput) {
            var maths, smalls, bigs, corps, cat, num;
            var str = $(pwdinput).val()
            var len = str.length;

            var cat = /.{16}/g
            if (len == 0) return 1;
            if (len > 16) { $(pwdinput).val(str.match(cat)[0]); }
            cat = /.*[\u4e00-\u9fa5]+.*$/
            if (cat.test(str)) {
                return -1;
            }
            cat = /\d/;
            var maths = cat.test(str);
            cat = /[a-z]/;
            var smalls = cat.test(str);
            cat = /[A-Z]/;
            var bigs = cat.test(str);
            var corps = corpses(pwdinput);
            var num = maths + smalls + bigs + corps;

            if (len < 6) { return 1; }

            if (len >= 6 && len <= 8) {
                if (num == 1) return 1;
                if (num == 2 || num == 3) return 2;
                if (num == 4) return 3;
            }

            if (len > 8 && len <= 11) {
                if (num == 1) return 2;
                if (num == 2) return 3;
                if (num == 3) return 4;
                if (num == 4) return 5;
            }

            if (len > 11) {
                if (num == 1) return 3;
                if (num == 2) return 4;
                if (num > 2) return 5;
            }
        }

        function corpses(pwdinput) {
            var cat = /./g
            var str = $(pwdinput).val();
            var sz = str.match(cat)
            for (var i = 0; i < sz.length; i++) {
                cat = /\d/;
                maths_01 = cat.test(sz[i]);
                cat = /[a-z]/;
                smalls_01 = cat.test(sz[i]);
                cat = /[A-Z]/;
                bigs_01 = cat.test(sz[i]);
                if (!maths_01 && !smalls_01 && !bigs_01) { return true; }
            }
            return false;
        }