更改文本框边框颜色，并验证电子邮件@

Question

Below is my code which is a client side form validation that only display the validation message but i want it to also change the border color to red when displaying the validation message. I did this (input #register-form {border:1px solid #ca4343;}) but did not work.

Also I what to check for @ in the email required validation

<script src="//code.jquery.com/jquery-1.9.1.js"></script>
<script src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.min.js"></script>

  <script>

  // When the browser is ready...
  $(function() {

    // Setup form validation on the #register-form element
    $("#register-form").validate({

        // Specify the validation rules
        rules: {
            name: "required",
            gender: "required",
            address: "required",
            email: {
                required: true,
                email: true
            },
            username: "required",
            password: {
                required: true,
                minlength: 5
            }
        },

        // Specify the validation error messages
        messages: {
            name: "<br>Please enter your name",
            gender: "<br>Please specify your gender",
            address: "<br>Please enter your address",
            email: "<br>Please enter a valid email address",
            username: "<br>Please enter a valid username",
            password: {
                required: "<br>Please provide a password",
                minlength: "<br>Your password must be at least 5 characters long"
            }
        },

        submitHandler: function(form) {
            form.submit();
        }
    });

  });

  </script>

  <form action="./" method="post" id="register-form" novalidate="novalidate">

    <div class="label">Name</div><input type="text" id="name" name="name"  /><br />
    <div class="label">Gender</div><select id="gender" name="gender" />
                                      <option value="">Select One</option>
                                      <option value="Female">Female</option>
                                      <option value="Male">Male</option>
                                   </select><br />
    <div class="label">Address</div><input type="text" id="address" name="address"  /><br />
    <div class="label">Email</div><input type="text" id="email" name="email"  /><br />
    <div class="label">Username</div><input type="text" id="username" name="username"  /><br />
    <div class="label">Password</div><input type="password" id="password" name="password" /><br />
    <div style="margin-left:140px;"><input type="submit" name="submit" value="Submit" /></div>

  </form>

Answer 1

Thats a form, not an input. Try this:

form#register-form {border:1px solid #ca4343;}

Or more preferably, assign invalid forms a class, eg 'invalid'. Then your CSS could read:

form.invalid {border:1px solid #ca4343;}

To only render invalid forms with this border.

Answer 2

  <style>
    .error,#register-form
    {
        border: solid 1px #ca4343
    }
  </style>

validation js add new class 'error' you can apply css on this class to show border

Answer 3

Create a new class in your css:

input.error {
  border:1px solid #ca4343;
}

.error is the default error class for the jquery validation plugin

OP added requirement to check for @ in email address:

the line email: true in your validate rules checks to see if the email address is a valid email address, and from the docs this appears to check for an @