密码强弱的判断(用正则表达式写)---2017-04-17

实现功能:

1、输入字符要在6-16之间;小于6个字符或大于16个字符时给予提示,而且强弱不显示;为0时,也给予提示;

2、当密码在6-16个字符之间时,如果密码全是数字或全是字母,显示弱;密码是数字与字母的组合,则显示强;若为字母数字加下划线,则为强;

效果图如下:

 代码如下:

 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <style>
            .mm-body{
                position: relative;
                height: 100px;
                width: 450px;
                background-color: wheat;
            }
            .mm-top{
                height:35px;
                width: 450px;
                background-color: wheat;
            }
            .mm-sr{
                height:30px;
                width: 100px; 
                float: left;
                text-align: center; 
                line-height: 30px;
            }
            #mm-pwd{
                float: left;
                height:25px;
                background-color: ghostwhite;
                border-radius: 5px; 
                width: 150px;
            }
        .mm-btm{
                height: 40px;
                width: 140px;
                position: relative;
                margin-left: 110px;
            }
        #lv1,#lv2,#lv3{
                height: 30px;
                width: 40px;
                border-top: 4px solid gainsboro; 
                margin-left: 3px;
                float: left;
                font-size: 18px;
                text-align: center;
                line-height: 25px;
            }
        </style>
    </head>
    
    <body>
        <div class="mm-body">
            <div class="mm-top">
                <span class="mm-sr">请输入密码:</span>
                <form method="get" action="data.html" >
            <input type="password" id="mm-pwd" onkeyup="show()"/>
            </form>
            <span id="mm-pd"style="color: red; font-size: 12px; line-height: 30px;"></span>
            </div>
            <div class="mm-btm">
              <div id="lv1">弱</div>
              <div id="lv2">中</div>
              <div id="lv3">强</div>
              
        <!--强度判断也可用表格做
              <table border="0px" cellpadding="0px" cellspacing="1px" >
                <tr height="20px" >
                    <td width="40px"  id="lv1" style="border-top: 3px solid darkgrey;">弱</td>
                    <td width="40px"  id="lv2" style="border-top: 3px solid darkgrey;">中</td>
                    <td width="40px"  id="lv3" style="border-top: 3px solid darkgrey;">强</td>
                </tr>
            </table>-->
              
              
            </div>
        </div>
    </body>
</html>
<script language="JavaScript">
function show(){
        var a=document.getElementById("mm-pwd").value;
        
  if(a.length==0){
        document.getElementById("mm-pd").innerHTML="密码不能为空!";    
    }
    else if(a.length<6){
        document.getElementById("mm-pd").innerHTML="密码长度小于6个字符!";    
    }
    
    else if(a.length>=6&&a.length<=16){
         document.getElementById("mm-pd").innerHTML="";
        var reg=/^[0-9]{6,16}$|^[a-zA-Z]{6,16}$/;    //全是数字或全是字母     6-16个字符
        var reg1=/^[A-Za-z0-9]{6,16}$/;     //数字、26个英文字母      6-16个字符
        var reg2=/^\w{6,16}$/;           // 由数字、26个英文字母或者下划线组成的字符串    6-16个字符
            if(a.match(reg)){
                 document.getElementById("lv1").style.borderTopColor="red";    
                
                 }
            else if(a.match(reg1)){
                document.getElementById("lv1").style.borderTopColor="red";    
                 document.getElementById("lv2").style.borderTopColor="yellow";    
            }
            else if(a.match(reg2)){
                document.getElementById("lv1").style.borderTopColor="red";
                 document.getElementById("lv2").style.borderTopColor="yellow";
                 document.getElementById("lv3").style.borderTopColor="green";    
            }
            }
    
    else if(a.length>16){
        document.getElementById("mm-pd").innerHTML="密码长度大于16个字符!";
        document.getElementById("lv1").style.borderTopColor="gainsboro";
        document.getElementById("lv2").style.borderTopColor="gainsboro";
       document.getElementById("lv3").style.borderTopColor="gainsboro";
    }
    
     }
    
</script>

 

注:代码为本人原创。

 

posted @ 2017-04-17 19:44  陈观爱  阅读(7945)  评论(2编辑  收藏  举报