用JavaScript来判断密码强度

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效果图:



HTML代码:


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jquert-password-strength</title>
<script type="text/javascript" src="js/jquery.js"></script>  
<script type="text/javascript" src="js/digitalspaghetti.password.js"></script>
<script type="text/javascript">
$(function() {
    $('#user_password').pstrength();
});
</script>
<style>
.pstrength-minchar {
font-size : 10px;
}
input {
    width:180px;
    height:12px;
    line-height:12px;
    padding:4px 0px;
    border: #cfcfcf 1px solid;
    color: #585858;
}
password-strength,.password-strength-bar {
    width:300px;
}
</style>
</head>


<body>
密码:<input type="password" id="user_password" name="user_password" />
</body>
</html>




JavaScript代码:




window.digitalspaghetti = window.digitalspaghetti || {};
digitalspaghetti.password = {    
    'defaults' : {
        'displayMinChar': true,
        'minChar': 6,
        'minCharText': '',
        'colors': ["#f00", "#c06", "#f60", "#3c0", "#3f0"],
        'scores': [20, 30, 43, 50],
        'verdicts':    ['弱', '一般', '较好', '很好', '极佳'],
        'raisePower': 1.4,
        'debug': false
    },
    'ruleScores' : {
        'length': 0,
        'lowercase': 1,
        'uppercase': 3,
        'one_number': 3,
        'three_numbers': 5,
        'one_special_char': 3,
        'two_special_char': 5,
        'upper_lower_combo': 2,
        'letter_number_combo': 2,
        'letter_number_char_combo': 2
    },
    'rules' : {
        'length': true,
        'lowercase': true,
        'uppercase': true,
        'one_number': true,
        'three_numbers': true,
        'one_special_char': true,
        'two_special_char': true,
        'upper_lower_combo': true,
        'letter_number_combo': true,
        'letter_number_char_combo': true
    },
    'validationRules': {
        'length': function (word, score) {
            digitalspaghetti.password.tooShort = false;
            var wordlen = word.length;
            var lenScore = Math.pow(wordlen, digitalspaghetti.password.options.raisePower);
            if (wordlen < digitalspaghetti.password.options.minChar) {
                lenScore = (lenScore - 100);
                digitalspaghetti.password.tooShort = true;
            }
            return lenScore;
        },
        'lowercase': function (word, score) {
            return word.match(/[a-z]/) && score;
        },
        'uppercase': function (word, score) {
            return word.match(/[A-Z]/) && score;
        },
        'one_number': function (word, score) {
            return word.match(/\d+/) && score;
        },
        'three_numbers': function (word, score) {
            return word.match(/(.*[0-9].*[0-9].*[0-9])/) && score;
        },
        'one_special_char': function (word, score) {
            return word.match(/.[!,@,#,$,%,\^,&,*,?,_,~]/) && score;
        },
        'two_special_char': function (word, score) {
            return word.match(/(.*[!,@,#,$,%,\^,&,*,?,_,~].*[!,@,#,$,%,\^,&,*,?,_,~])/) && score;
        },
        'upper_lower_combo': function (word, score) {
            return word.match(/([a-z].*[A-Z])|([A-Z].*[a-z])/) && score;
        },
        'letter_number_combo': function (word, score) {
            return word.match(/([a-zA-Z])/) && word.match(/([0-9])/) && score;
        },
        'letter_number_char_combo' : function (word, score) {
            return word.match(/([a-zA-Z0-9].*[!,@,#,$,%,\^,&,*,?,_,~])|([!,@,#,$,%,\^,&,*,?,_,~].*[a-zA-Z0-9])/) && score;
        }
    },
    'attachWidget': function (element) {
        var output = ['<div id="password-strength">'];
        if (digitalspaghetti.password.options.displayMinChar && !digitalspaghetti.password.tooShort) {
            output.push('<span class="password-min-char">' + digitalspaghetti.password.options.minCharText.replace('%d', digitalspaghetti.password.options.minChar) + '</span>');
        }
        output.push('<span class="password-strength-bar"></span>');
        output.push('</div>');
        output = output.join('');
        jQuery(element).after(output);
    },
   'debugOutput': function (element) {
        if (typeof console.log === 'function') {
            console.log(digitalspaghetti.password);    
        } else {
            alert(digitalspaghetti.password);
        }
    },
    'addRule': function (name, method, score, active) {
        digitalspaghetti.password.rules[name] = active;
        digitalspaghetti.password.ruleScores[name] = score;
        digitalspaghetti.password.validationRules[name] = method;
        return true;
    },
    'init': function (element, options) {
        digitalspaghetti.password.options = jQuery.extend({}, digitalspaghetti.password.defaults, options);
        digitalspaghetti.password.attachWidget(element);
        jQuery(element).keyup(function () {
            digitalspaghetti.password.calculateScore(jQuery(this).val());
        });
        if (digitalspaghetti.password.options.debug) {
            digitalspaghetti.password.debugOutput();
        }
    },
    'calculateScore': function (word) {
        digitalspaghetti.password.totalscore = 0;
        digitalspaghetti.password.width = 0;
        for (var key in digitalspaghetti.password.rules) if (digitalspaghetti.password.rules.hasOwnProperty(key)) {
            if (digitalspaghetti.password.rules[key] === true) {
                var score = digitalspaghetti.password.ruleScores[key];
                var result = digitalspaghetti.password.validationRules[key](word, score);
                if (result) {
                    digitalspaghetti.password.totalscore += result;
                }
            }
            if (digitalspaghetti.password.totalscore <= digitalspaghetti.password.options.scores[0]) {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[0];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[0];
                digitalspaghetti.password.width =  "3";
            } else if (digitalspaghetti.password.totalscore > digitalspaghetti.password.options.scores[0] && digitalspaghetti.password.totalscore <= digitalspaghetti.password.options.scores[1]) {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[1];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[1];
                digitalspaghetti.password.width =  "6";
            } else if (digitalspaghetti.password.totalscore > digitalspaghetti.password.options.scores[1] && digitalspaghetti.password.totalscore <= digitalspaghetti.password.options.scores[2]) {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[2];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[2];
                digitalspaghetti.password.width =  "9";
            } else if (digitalspaghetti.password.totalscore > digitalspaghetti.password.options.scores[2] && digitalspaghetti.password.totalscore <= digitalspaghetti.password.options.scores[3]) {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[3];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[3];
                digitalspaghetti.password.width =  "12";
            } else {
                digitalspaghetti.password.strColor = digitalspaghetti.password.options.colors[4];
                digitalspaghetti.password.strText = digitalspaghetti.password.options.verdicts[4];
                digitalspaghetti.password.width =  "15";
            }
            jQuery('.password-strength-bar').stop();
            
            if (digitalspaghetti.password.options.displayMinChar && !digitalspaghetti.password.tooShort) {
                jQuery('.password-min-char').hide();
            } else {
                jQuery('.password-min-char').show();
            }
            
            jQuery('.password-strength-bar').animate({opacity: 0.5}, 'fast', 'linear', function () {
                jQuery(this).css({'display': 'block', 'background-color': digitalspaghetti.password.strColor, 'width': digitalspaghetti.password.width + "%"}).text(digitalspaghetti.password.strText);
                jQuery(this).animate({opacity: 1}, 'fast', 'linear');
            });
        }
    }
};


jQuery.extend(jQuery.fn, {
    'pstrength': function (options) {
        return this.each(function () {
            digitalspaghetti.password.init(this, options);
        });
    }
});
jQuery.extend(jQuery.fn.pstrength, {
    'addRule': function (name, method, score, active) {
        digitalspaghetti.password.addRule(name, method, score, active);
        return true;
    },
    'changeScore': function (rule, score) {
        digitalspaghetti.password.ruleScores[rule] = score;
        return true;
    },
    'ruleActive': function (rule, active) {
        digitalspaghetti.password.rules[rule] = active;
        return true;
    }
});



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