Formularüberprüfung der JavaScript-Tutorial-Registrierungsseite-js-Tutorial-php.cn

Der folgende Editor zeigt Ihnen ein Beispiel für die Verwendung von JavaScript zum Ausfüllen der Formularüberprüfung auf der Registrierungsseite. Der Herausgeber findet es ziemlich gut, deshalb teile ich es jetzt mit Ihnen und gebe es als Referenz. Folgen wir dem Editor, um einen Blick darauf zu werfen

1. Schrittanalyse

Schritt eins: Bestimmen Sie das Ereignis (onsubmit) und bereiten Sie es vor Es bindet eine Funktion

Schritt 2: Schreiben Sie diese Funktion (rufen Sie die vom Benutzer eingegebenen Daten ab)

Schritt 3: An den Benutzer Beurteilen Sie die eingegebenen Daten

Schritt 4: Die Daten sind legal (lassen Sie das Absenden des Formulars zu)

Schritt 5: Die Daten sind illegal (geben Sie eine Fehlermeldung aus und erlauben Sie nicht das einzureichende Formular)

Frage: Wie steuere ich die Formularübermittlung?

Über das Ereignis onsubmit: Wird im Allgemeinen für die Formularübermittlung verwendet, dann muss beim Definieren der Funktion ein Rückgabewert angegeben werden.

onsubmit = return checkForm()

2. Vervollständigen Sie die Überprüfung des Registrierungsseitenformulars

<!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>

Nach dem Login kopieren

Reguläre Ausdrücke werden im Verifizierungs- und Bestätigungsteil des Passworts verwendet (Sie müssen sich nichts merken, suchen Sie bei Bedarf nach Dokumenten).

Regulärer Ausdruck.test (Verifizierungsobjekt) ist wahr, um dies anzuzeigen Die Bedingungen sind erfüllt, was bedeutet, dass False nicht erfüllt ist.

Das obige ist der detaillierte Inhalt vonFormularüberprüfung der JavaScript-Tutorial-Registrierungsseite. Für weitere Informationen folgen Sie bitte anderen verwandten Artikeln auf der PHP chinesischen Website!