jquery密码强度检测

<!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>密码强度</title> 
<script type="text/javascript" src="jquery.min.js"></script>
<style type="text/css"> 
/*密码强度*/
.pw-strength {clear: both;position: relative;top: 8px;width: 180px;}
.pw-bar{background: url(pwd-1.png) no-repeat;height: 14px;overflow: hidden;width: 179px;}
.pw-bar-on{background:  url(pwd-2.png) no-repeat; width:0px; height:14px;position: absolute;top: 1px;left: 2px;transition: width .5s ease-in;-moz-transition: width .5s ease-in;-webkit-transition: width .5s ease-in;-o-transition: width .5s ease-in;}
.pw-weak .pw-defule{ width:0px;}
.pw-weak .pw-bar-on {width: 60px;}
.pw-medium .pw-bar-on {width: 120px;}
.pw-strong .pw-bar-on {width: 179px;}
.pw-txt {padding-top: 2px;width: 180px;overflow: hidden;}
.pw-txt span {color: #707070;float: left;font-size: 12px;text-align: center;width: 58px;}</style>

<script type="text/javascript"> 
$(function(){ 
    $('#pass').keyup(function () { 
        var strongRegex = new RegExp("^(?=.{8,})(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*\W).*$", "g"); 
        var mediumRegex = new RegExp("^(?=.{7,})(((?=.*[A-Z])(?=.*[a-z]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[a-z])(?=.*[0-9]))).*$", "g"); 
        var enoughRegex = new RegExp("(?=.{6,}).*", "g"); 
    
        if (false == enoughRegex.test($(this).val())) { 
            $('#level').removeClass('pw-weak'); 
            $('#level').removeClass('pw-medium'); 
            $('#level').removeClass('pw-strong'); 
            $('#level').addClass(' pw-defule'); 
             //密码小于六位的时候，密码强度图片都为灰色 
        } 
        else if (strongRegex.test($(this).val())) { 
            $('#level').removeClass('pw-weak'); 
            $('#level').removeClass('pw-medium'); 
            $('#level').removeClass('pw-strong'); 
            $('#level').addClass(' pw-strong'); 
             //密码为八位及以上并且字母数字特殊字符三项都包括,强度最强 
        } 
        else if (mediumRegex.test($(this).val())) { 
            $('#level').removeClass('pw-weak'); 
            $('#level').removeClass('pw-medium'); 
            $('#level').removeClass('pw-strong'); 
            $('#level').addClass(' pw-medium'); 
             //密码为七位及以上并且字母、数字、特殊字符三项中有两项，强度是中等 
        } 
        else { 
            $('#level').removeClass('pw-weak'); 
            $('#level').removeClass('pw-medium'); 
            $('#level').removeClass('pw-strong'); 
            $('#level').addClass('pw-weak'); 
             //如果密码为6为及以下，就算字母、数字、特殊字符三项都包括，强度也是弱的 
        } 
        return true; 
    }); 
}) 
</script>

</head> 
<body>

<table style="320px;margin:40px auto;">
    <tr>
        <th>密码</th>
        <td><span  class="tbl-txt"><input id="pass" class="input-style" size="30" maxlength="30" name="pass" type="text" /></span></td>
    </tr>
    <tr>    
        <th></th>       
        <td id="level" class="pw-strength">               
            <div class="pw-bar"></div>
            <div class="pw-bar-on"></div>
            <div class="pw-txt">
            <span>弱</span>
            <span>中</span>
            <span>强</span>
            </div>
        </td>    
    </tr>
</table>

</body>
</html>
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