js验证密码强弱

JS密码强度验证

<%@ Page Language="C#" %>

<!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 id="Head1" runat="server">

    <title>无标题页</title>

    <script language="javascript" type="text/javascript">

    //CharMode函数

    //测试某个字符是属于哪一类.

    function CharMode(iN){

        if (iN>=48 && iN <=57) //数字

        return 1;

        if (iN>=65 && iN <=90) //大写字母

        return 2;

        if (iN>=97 && iN <=122) //小写

        return 4;

        else

        return 8; //特殊字符

    }

    //bitTotal函数

    //计算出当前密码当中一共有多少种模式

    function bitTotal(num){

        modes=0;

        for (i=0;i<4;i++){

        if (num & 1) modes++;

        num>>>=1;

        }

        return modes;

    }

    //checkStrong函数

    //返回密码的强度级别  

    function checkStrong(sPW){

        if (sPW.length<=4)

        return 0; //密码太短

        Modes=0;

        for (i=0;i<sPW.length;i++){

        //测试每一个字符的类别并统计一共有多少种模式.

        Modes|=CharMode(sPW.charCodeAt(i));

        }

        return bitTotal(Modes);

    }  

    //pwStrength函数

    //当用户放开键盘或密码输入框失去焦点时,根据不同的级别显示不同的颜色

    function pwStrength(pwd){

        O_color="#e0f0ff";

        L_color="#FF0000";

        M_color="#FF9900";

        H_color="#33CC00";

        if (pwd==null||pwd==''){

            Lcolor=Mcolor=Hcolor=O_color;

        }

        else

        {

            S_level=checkStrong(pwd);

            switch(S_level)

            {

                case 0:

                Lcolor=Mcolor=Hcolor=O_color;

                case 1:

                Lcolor=L_color;

                Mcolor=Hcolor=O_color;

                break;

                case 2:

                Lcolor=Mcolor=M_color;

                Hcolor=O_color;

                break;

                default:

                Lcolor=Mcolor=Hcolor=H_color;

            }

        }  

        document.getElementById("strength_L").style.background=Lcolor;

        document.getElementById("strength_M").style.background=Mcolor;

        document.getElementById("strength_H").style.background=Hcolor;

        return;

    }  

</script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

        输入密码:<input id="TextBox1" runat="server" onkeyup="pwStrength(this.value)" onblur="pwStrength(this.value)" /><br />

        密码强度:

        <table border="1" cellpadding="1" cellspacing="1" borderColorDark="#fdfeff" borderColorLight="#99ccff" style="width: 200px; display: inline; background-color:#e0f0ff">

            <tr>

                <td id="strength_L" style="width: 100px; height: 19px;" align="center">

                    弱</td>

                <td id="strength_M" style="width: 100px; height: 19px;" align="center">

                    中</td>

                <td id="strength_H" style="width: 100px; height: 19px;" align="center">

                    强</td>

            </tr>

        </table>

    </div>

    </form>

</body>

</html>
效果如图：
巴特西

js验证密码强弱

JS密码强度验证

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