Exemple de JavaScript complétant la vérification du formulaire sur la page d'inscription-js tutoriel-php.cn

L'éditeur suivant vous apportera un exemple d'utilisation de JavaScript pour compléter la vérification du formulaire page d'inscription. L'éditeur pense que c'est plutôt bien, je vais donc partager le code source js avec vous maintenant et le donner comme référence. Si vous êtes intéressé par JavaScript, veuillez suivre l'éditeur pour y jeter un œil

1 Étape d'analyse

Étape 1 : Déterminer. l'événement (onsubmit) et y lier une fonction

Étape 2 : Écrivez cette fonction (récupérez les données saisies par l'utilisateur)

Chapitre Étape 3 : Juger les données saisies par l'utilisateur

Étape 4 : Les données sont légales (autoriser la soumission du formulaire)

Étape 5 : Les données sont illégales (donner un message d'erreur et empêcher la soumission du formulaire) )

Question : Comment contrôler la soumission du formulaire ?

À propos de l'événement onsubmit : Généralement utilisé pour la soumission de formulaire, une valeur de retour doit être donnée lorsque définit la fonction .

onsubmit = return checkForm()

2. Complétez la vérification du formulaire de la page d'inscription

<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title>注册页面</title>
  <script>
   function checkForm(){
    //alert("aa");
    
    /**校验用户名*/
    //1.获取用户输入的数据
    var uValue=document.getElementById("user").value;
    //alert(uValue);
    if(uValue==""){
     //2.给出错误提示信息
     alert("用户名不能为空");
     return false;
    }
    
    /**校验密码*/
    var pValue=document.getElementById("password").value;
    if(pValue==""){     //注意空的表示方法
     alert("密码不能为空");
     return false;
    }
     
    /** 校验确认密码*/
    var rpValue=document.getElementById("repassword").value;
    if(rpValue!=pValue){
     alert("两次密码输入不一致！");
     return false;
    }
    
    /**校验邮箱*/
    var eValue=document.getElementById("email").value;
    if(！/^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/.test(eValue)){
     alert("邮箱格式不正确！");
    }
   }
  </script>
 </head>
 <body>
  <table border="1px" align="center" width="1300px" cellpadding="0px" cellspacing="0px">
   
   <!--1.logo部分-->
   <tr>
    <td>
     <!--嵌套一个一行三列的表格-->
     <table border="1px" width="100%">
      <tr height="50px">
       <td width="33.3%">
        <img src="../img/logo2.png" height="47px" />
       </td>
       <td width="33.3%">
        <img src="../img/header.png" height="47px"/>
       </td>
       <td width="33.3%">
        <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >登录</a>
        <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >注册</a>
        <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >购物车</a>
       </td>
      </tr>
     </table>
    </td>
   </tr>
   
   <!--2.导航栏部分-->
   <tr height="50px" >
    <td bgcolor="black">
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font size="3" color="white">首页</font></a>           
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font color="white">手机数码</font></a>        
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font color="white">电脑办公</font></a>       
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font color="white">鞋靴箱包</font></a>       
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font color="white">家用电器</font></a>
    </td>
   </tr>
   
   <!--3.注册表单-->
   <tr>
    <td height="600px" background="../img/regist_bg.jpg">
     <!--嵌套一个十行二列的表格-->
     <form action="#" method="get" name="regForm" onsubmit="return checkForm()">
     <table border="1px" width="750px" height="400px" align="center" cellpadding="0px" cellspacing="0px" bgcolor="white">
      <tr height="40px">
       <td colspan="2">
        <font size="4">会员注册</font>   USER REGISTER
       </td>
      </tr>
      <tr>
       <td>用户名</td>
       <td>
        <input type="text" name="user" size="35px" id="user"/>
       </td>
      </tr>
      <tr>
       <td>密码</td>
       <td>
        <input type="password" name="password" size="35px" id="password"/>
       </td>
      </tr>
      <tr>
       <td>确认密码</td>
       <td>
        <input type="password" name="repassword" size="35px" id="repassword"/>
       </td>
      </tr>
      <tr>
       <td>E-mail</td>
       <td>
        <input type="text" name="e-mail" size="35px" id="email"/>
       </td>
      </tr>
      <tr>
       <td>姓名</td>
       <td>
        <input type="text" name="username" size="35px"/>
       </td>
      </tr>
      <tr>
       <td>性别</td>
       <td>
        <input type="radio" name="sex" value="男"/>男
        <input type="radio" name="sex" value="女"/>女
       </td>
      </tr>
      <tr>
       <td>出生日期</td>
       <td>
        <input type="text" name="birthday" size="35px"/>
       </td>
      </tr>
      <tr>
       <td>验证码</td>
       <td>
        <input type="text" name="yzm" />
        <img src="../img/yanzhengma.png" />
       </td>
      </tr>
      <tr align="center">
       <td colspan="2">
        <input type="submit" value="注册" />
       </td>
      </tr>
     </table>
     </form>
    </td>
   </tr>
   
   <!--4.广告图片-->
   <tr>
    <td>
     <img src="../img/footer.jpg" width="100%"/>
    </td>
   </tr>
   
   <!--5.友情链接和版权信息-->
   <tr>
    <td align="center">
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>关于我们</font></a>
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>联系我们</font></a>
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>招贤纳士</font></a>
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>法律声明</font></a>
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>友情链接</font></a>
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>支付方式</font></a>
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>配送方式</font></a>
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>服务声明</font></a>
     <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><font>广告声明</font></a>
     <p>
      Copyright © 2005-2016 hh商城 版权所有 
     </p>
    </td>
   </tr>
  </table>
 </body>
</html>

Copier après la connexion

En vérification Le la partie de confirmation du mot de passe utilise une expression régulière (pas besoin de s'en souvenir, recherchez des documents si nécessaire)

expression régulière.test (objet de vérification) est vrai s'il remplit les conditions, et faux s'il n’est pas conforme.

L'exemple ci-dessus de JavaScript complétant la vérification du formulaire sur la page d'inscription est tout le contenu partagé par l'éditeur. J'espère qu'il pourra vous donner une référence, et j'espère que vous soutiendrez le site Web PHP chinois.

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Ce qui précède est le contenu détaillé de. pour plus d'informations, suivez d'autres articles connexes sur le site Web de PHP en chinois!