How to use JS+jQuery to verify registration information-JS Tutorial-php.cn

This time I will show you how to use JS jQuery to verify registration information, and what are the precautions for using JS jQuery to verify registration information. The following is a practical case, let's take a look.

The effect achieved with JS and JQuery is the same.

HTML code

<legend> 请填写注册信息</legend>
  <form action="index.html" method="post">
    <table style="text-align: right;">
      <tr>
        <td>用户名：</td>
        <td><input type="text" name="userName" placeholder="由英文字母和数字组成的4-16位字符，以字母开头">
        </td>
      </tr>
      <tr>
        <td>昵称：</td>
        <td><input type="text" name="nickName" placeholder="由2-6个汉字组成">
        </td>
      </tr>
      <tr>
        <td>邮箱：</td>
        <td><input type="text" name="email" placeholder="邮箱账号@域名。如good@tom.com、whj@sina.com.cn">
        </td>
      </tr>
      <tr>
        <td>密码：</td>
        <td><input type="password" name="pwd" placeholder="由英文字母和数字组成的4-10位字符">
        </td>
      </tr>
      <tr>
        <td>确认密码：</td>
        <td><input type="password" name="pwd2" placeholder="确认密码">
        </td>
      </tr>
      <tr>
        <td>手机号码：</td>
        <td><input type="text" name="phone" placeholder="手机号由11位数字组成，且以13,15,18开头">
        </td>
      </tr>
      <tr>
        <td>出生日期：</td>
        <td><input type="text" name="date" placeholder="出生日期在1990-2009之间">
      </tr>
      <tr>
        <td colspan="2" align="left"><input type="button" name="submit" value="提交"></td>
      </tr>
    </table>
  </form>
</fieldset>

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CSS style

 body {
      text-align: center;
      padding: 0;
      margin: 0;
    }
    fieldset {
      width: 800px;
    }
    table tr td ~ td {
      text-align: left;
      width: 600px;
    }

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JS code

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//验证用户名
function check_userName() {
  var userName = document.getElementById("name").value;
  var regName = /[a-zA-Z]\w{4,16}/
  if (userName == "" || userName.trim() == "") {
    document.getElementById("err_name").innerHTML = "请输入用户名";
    return false;
  } else if (!regName.test(userName)) {
    document.getElementById("err_name").innerHTML = "由英文字母和数字组成的4-16位字符，以字母开头";
    return false;
  } else {
    document.getElementById("err_name").innerHTML = "ok!!!";
    return true;
  }
}
//验证昵称
function check_nickName() {
  var nickName = document.getElementById("nick").value;
  var regName = /[\u4e00-\u9fa5]{2,6}/
  if (nickName == "" || nickName.trim() == "") {
    document.getElementById("err_nick").innerHTML = "请输入昵称";
    return false;
  } else if (!regName.test(nickName)) {
    document.getElementById("err_nick").innerHTML = "由2-6个汉字组成";
    return false;
  } else {
    document.getElementById("err_nick").innerHTML = "ok!!!";
    return true;
  }
}
//验证邮箱
function check_email() {
  var email = document.getElementById("email").value;
  var regEmail = /^\w+@\w+((\.\w+)+)$/;
  if (email == "" || email.trim() == "") {
    document.getElementById("err_email").innerHTML = "请输入邮箱";
    return false;
  } else if (!regEmail.test(email)) {
    document.getElementById("err_email").innerHTML = "邮箱账号@域名。如good@tom.com、whj@sina.com.cn";
    return false;
  } else {
    document.getElementById("err_email").innerHTML = "ok!!!";
    return true;
  }
}
//验证密码
function check_pwd() {
  var pwd = document.getElementById("pwd").value;
  var regPwd = /^\w{4,10}$/;
  if (pwd == "" || pwd.trim() == "") {
    document.getElementById("err_pwd").innerHTML = "请输入密码";
    return false;
  } else if (!regPwd.test(pwd)) {
    document.getElementById("err_pwd").innerHTML = "格式错误";
    return false;
  } else {
    document.getElementById("err_pwd").innerHTML = "ok!!!";
    return true;
  }
}
//确认密码
function check_pwd2() {
  var pwd = document.getElementById("pwd").value;
  var pwd2 = document.getElementById("pwd2").value;
  if (pwd2 == "" || pwd2.trim() == "") {
    document.getElementById("err_pwd2").innerHTML = "请输入密码";
    return false;
  } else if (!pwd2.equals(pwd)) {
    document.getElementById("err_pwd2").innerHTML = "两次输入密码不一致";
    return false;
  } else {
    document.getElementById("err_pwd2").innerHTML = "ok!!!";
    return true;
  }
}
//验证手机号
function check_phone() {
  var phone = document.getElementById("phone").value;
  var regPhone = /[13,15,18]\d{9}/;
  if (phone == "" || phone.trim() == "") {
    document.getElementById("err_phone").innerHTML = "请输入手机号";
    return false;
  } else if (!regPhone.test(phone)) {
    document.getElementById("err_phone").innerHTML = "手机号由11位数字组成，且以13,15,18开头";
    return false;
  } else {
    document.getElementById("err_phone").innerHTML = "ok!!!";
    return true;
  }
}
//验证时间
function check_date() {
  var birthday = document.getElementById("birthday").value;
  var regDate = /[13,15,18]\d{9}/;
  if (birthday == "" || birthday.trim() == "") {
    document.getElementById("err_date").innerHTML = "请输入日期";
    return false;
  } else if (!regDate.test(birthday)) {
    document.getElementById("err_date").innerHTML = "出生日期在1990-2009之间";
    return false;
  } else {
    document.getElementById("err_date").innerHTML = "ok!!!";
    return true;
  }
}

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Jquery code

 $(function () {
      var errMsg;
      $.each($("input"), function (i, val) {
        $(val).blur(function () {
          if ($(val).attr("name") == "userName") {
            $(".nameMsg").remove();
            var userName = val.value;
            var regName = /[a-zA-Z]\w{4,16}/
            if (userName == "" || userName.trim() == "") {
              errMsg = "<span class=&#39;nameMsg&#39; style=&#39;color:red;&#39;>用户名不能为空</span>";
            } else if (!regName.test(userName)) {
              errMsg = "<span class=&#39;nameMsg&#39; style=&#39;color:red;&#39;>由英文字母和数字组成的4-16位字符，以字母开头</span>";
            } else {
              errMsg = "<span class=&#39;nameMsg&#39; style=&#39;color:red;&#39;>OK！</span>";
            }
            $(this).parent().append(errMsg);
          } else if ($(val).attr("name") == "nickName") {
            $(".nickMsg").remove();
            var nickName = val.value;
            var regName = /[\u4e00-\u9fa5]{2,6}/
            if (nickName == "" || nickName.trim() == "") {
              errMsg = "<span class=&#39;nickMsg&#39; style=&#39;color:red;&#39;>昵称不能为空</span>";
            } else if (!regName.test(nickName)) {
              errMsg = "<span class=&#39;nickMsg&#39; style=&#39;color:red;&#39;>由2-6个汉字组成</span>";
            } else {
              errMsg = "<span class=&#39;nickMsg&#39; style=&#39;color:red;&#39;>OK！</span>";
            }
            $(this).parent().append(errMsg);
          } else if ($(val).attr("name") == "email") {
            $(".emailMsg").remove();
            var email = val.value;
            var regEmail = /^\w+@\w+((\.\w+)+)$/;
            if (email == "" || email.trim() == "") {
              errMsg = "<span class=&#39;emailMsg&#39; style=&#39;color:red;&#39;>邮箱不能为空</span>";
            } else if (!regEmail.test(email)) {
              errMsg = "<span class=&#39;emailMsg&#39; style=&#39;color:red;&#39;>邮箱账号@域名。如good@tom.com、whj@sina.com.cn</span>";
            } else {
              errMsg = "<span class=&#39;emailMsg&#39; style=&#39;color:red;&#39;>OK！</span>";
            }
            $(this).parent().append(errMsg);
          } else if ($(val).attr("name") == "pwd") {
            $(".pwdMsg").remove();
            var pwd = val.value;
            var regPwd = /^\w{4,10}$/;
            if (pwd == "" || pwd.trim() == "") {
              errMsg = "<span class=&#39;pwdMsg&#39; style=&#39;color:red;&#39;>密码不能为空</span>";
            } else if (!regPwd.test(pwd)) {
              errMsg = "<span class=&#39;pwdMsg&#39; style=&#39;color:red;&#39;>格式错误</span>";
            } else {
              errMsg = "<span class=&#39;pwdMsg&#39; style=&#39;color:red;&#39;>OK！</span>";
            }
            $(this).parent().append(errMsg);
          } else if ($(val).attr("name") == "pwd2") {
            $(".pwd2Msg").remove();
            var pwd2 = val.value;
            var pwd = $("input")[3].value;
            if (pwd2 == "" || pwd2.trim() == "" || !pwd2.equals(pwd)) {
              errMsg = "<span class=&#39;pwd2Msg&#39; style=&#39;color:red;&#39;>两次输入密码不一致</span>";
            } else {
              errMsg = "<span class=&#39;pwd2Msg&#39; style=&#39;color:red;&#39;>OK！</span>";
            }
            $(this).parent().append(errMsg);
          } else if ($(val).attr("name") == "phone") {
            $(".phoneMsg").remove();
            var phone = val.value;
            var regPhone = /[13,15,18]\d{9}/;
            if (phone == "" || phone.trim() == "") {
              errMsg = "<span class = &#39;phoneMsg&#39; style = &#39;color:red;&#39; > 手机号不能为空 < /span>"
            } else if (!regPhone.test(phone)) {
              errMsg = "<span class = &#39;phoneMsg&#39; style = &#39;color:red;&#39; > 格式错误 < /span>"
            } else {
              errMsg = "<span class = &#39;phoneMsg&#39; style = &#39;color:red;&#39; > OK！ < /span>"
            }
            $(this).parent().append(errMsg);
          } else if ($(val).attr("name") == "date") {
            $(".dateMsg").remove();
            var birthday = val.value;
            var regDate = /(199\d|200\d)[-/](0\d|1[0-2])[-/](0\d|[1-2]\d|30|31)/;
            if (birthday == "" || birthday.trim() == "") {
              errMsg = "<span class=&#39;dateMsg&#39; style=&#39;color:red;&#39;>请输入生日</span>";
            } else if (!regDate.test(birthday)) {
              errMsg = "<span class=&#39;dateMsg&#39; style=&#39;color:red;&#39;>格式错误</span>";
            } else {
              errMsg = "<span class=&#39;dateMsg&#39; style=&#39;color:red;&#39;>OK！</span>";
            }
            $(this).parent().append(errMsg);
          }
        });
      });
    });

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I believe you have mastered it after reading the case in this article For more exciting methods, please pay attention to other related articles on the php Chinese website!