密码强度和验证码的最简单的设置方法-原创手记-慕课网

// 密码强度的简单范例
<input id="password" type="password" name="password" rule="" onblur="check()">
<ul >
<li id="mima">弱</li>
<li id="mima1">中</li>
<li id="mima2">强</li>
</ul>

javascript代码
function check(){

    var reg1=/^\w{3}$/;
    var reg2=/^\w{4}$/;
    var reg3=/^\w{5}$/;
    var str =document.getElementById('password').value;
    if(reg1.test(str)){

        document.getElementById('mima').style.background='red';

    } else if(reg2.test(str)){
        document.getElementById('mima').style.background='';
        document.getElementById('mima1').style.background='yellow';
    }else if(reg3.test(str)){
        document.getElementById('mima1').style.background='';
        document.getElementById('mima2').style.background='green';
    }

 }

验证码

<!doctype html>
<html>
<head runat="server">

<style type="text/css">
.code
{
        background:url(code_bg.jpg);
        font-family:Arial;
        font-style:italic;
         color:blue;
         font-size:30px;
         border:0;
         padding:2px 3px;
         letter-spacing:3px;
         font-weight:bolder;            
         float:left;           
         cursor:pointer;
         width:150px;
         height:60px;
         line-height:60px;
         text-align:center;
         vertical-align:middle;

}
a
{
    text-decoration:none;
    font-size:12px;
    color:#288bc4;
    }
a:hover
{
   text-decoration:underline;
    }
</style>
<script language="javascript" type="text/javascript">

    var code;
    function createCode() {
        code = "";
        var codeLength = 6; //验证码的长度
        var checkCode = document.getElementById("checkCode");
        var codeChars = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
        'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',
        'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'); //所有候选组成验证码的字符，当然也可以用中文的
        for (var i = 0; i < codeLength; i++)
        {
            var charNum = Math.floor(Math.random() * 52);
            code += codeChars[charNum];
        }
        if (checkCode)
        {
            checkCode.className = "code";
            checkCode.innerHTML = code;
        }
    }
    function validateCode()
    {
        var inputCode = document.getElementById("inputCode").value;
        if (inputCode.length <= 0)
        {
            alert("请输入验证码！");
        }
        else if (inputCode.toUpperCase() != code.toUpperCase())
        {
            alert("验证码输入有误！");
            createCode();
        }
        else
        {
            alert("验证码正确！");
        }       
    }   
 </script>

</head>
<body onload="createCode()">
<form id="form1" runat="server" onsubmit="validateCode()">
<div>
<table border="0" cellspacing="5" cellpadding="5" >
<tr>
<td></td><td> <div class="code" id="checkCode" onclick="createCode()" ></div></td>
<td><a href="#" onclick="createCode()">看不清换一张</a></td>
</tr>
<tr>
<td>验证码：</td><td><input style="float:left;" type="text" id="inputCode" /></td><td>请输入验证码</td>
</tr>
<tr><td></td><td><input id="Button1" onclick="validateCode();" type="button" value="确定" /></td><td></td>
</tr>
</table>
</div>
</form>

</body>
</html>