初学js正则表达式之密码强度验证

时间：2024-09-29 14:33:50
<!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>passwordCheck</title>

<script type="text/javascript" src="Js/jquery1.6.1.js"></script>

<script type="text/javascript">

    $(function() {

        $('#pwd').keyup(function() {

            var val = $(this).val();

            isDigit(val);

        });  

        function isDigit(s) {

            var pattern_d = /^\d+$/;            //全数字

            var pattern_s = /^[A-Za-z]+$/       //全字符

            var pattern_w = /^\w+$/;            //数字或者字符

            var pattern_W = /^\W+$/             //全非数字也非字符

            var pattern_r = /^\w+\W+[\w\W]*\w+$/    //以字母或者数字开头结尾的字符串

            var html = '';

            var x = 0;

            var y = 0;  

            $('#user').html(s);

            if(pattern_W.exec(s)) {

                html += '非数字也非字符<br />';

                x = 0;

                y = 0;

            }

            if(pattern_w.exec(s)) {

                html += '数字或者字符<br />';

                y = 1;

            }

            if(pattern_d.exec(s)) {

                html += '全数字<br />';

                x = 1;

                y = 0;

            }

            if(pattern_s.exec(s)) {

                html += '全字符<br />';

                x = 2;

                y = 0;

            }

            if(pattern_r.exec(s)) {

                html += '以字母或者数字开头结尾的字符串<br />';

                x = 3;

                y = 2;

            }

            if( y === 0 && x === 0) {

                html += '密码格式错误<br />';

            }

            if( x > 0 && y === 0) {

                html += '安全级别《低》<br />';

            }

            if( x === 0 && y === 1) {

                html += '安全级别《中》<br />';

            }

            if( y === 2) {

                html += '安全级别《高》<br />';

            }

            html += x + '<br />' + y;

            $('#password').html(html);

        };

    });

</script>

</head>  

<body>

<form action="#" method="#">

    用户名：<input type="text" name="" /><span id="user"></span><br />

    密码：<input type="password" name="" id="pwd" /><span id="password"></span><br />

</form>

</body>

</html>

　　

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