Javascript 如何使Enter键将其提交到数据库？

当前，当我单击“更改密码”按钮时，此功能可以正常工作，但我希望使用enter键使其正常工作。这是使用Codeigniter，并尝试使用标准html输入类型对其进行更改。但它没有起作用。如果您有任何帮助，我们将不胜感激

请使用表单进行包装，浏览器将处理此问题。还可以使用提交按钮类型：

public function change_password ()
{
    if($this->input->post('submit_btn')){
        $this->session->set_flashdata('success','Password Changed Successfully');
        redirect('dashboard');
    }   
    // Set up the form
    $rules = array(

        'newpassword' => array(
            'field' => 'newpassword', 
            'label' => 'New Password', 
            'rules' => 'trim|required|min_length[6]|xss_clean|check_pass'
        ), 
        'conpassword' => array(
            'field' => 'conpassword', 
            'label' => 'Confirm Password', 
            'rules' => 'trim|required|min_length[6]|matches[newpassword]|xss_clean|check_pass'
        ), 
    );


    $this->form_validation->set_rules($rules);
    $this->form_validation->set_message('required', 'this field is required');

    // Process the form
    if ($this->form_validation->run() == TRUE) {
        $password = $this->input->post("newpassword");
        $userid = $this->session->userdata("id");               
        if($this->user_m->change_password($password, $userid)){
            $this->data['message'] = 'password changed successfully';
            //$this->data['subview'] = 'home/index';
            //$this->load->view('_layout_main_1', $this->data);
        }else{
            $this->data['message'] = 'password must have at least one uppercase letter and a number';
        }               
        $this->data['refresh'] = true;
    }

    // Load view

    $this->load->view('home/change_password', $this->data);
}

img/close.png“>
修改密码
var code=e.keyCode | | e.which；if（code==13）{//Enter keyCode做点击按钮的代码}
按钮的类型是什么，
submit
或
按钮
？提交按钮正在使用“提交”
$（函数（）{//twitter引导脚本$（“.submit submit”）。点击（函数（e）{var-sdata$（'.ajaxForm）.serialize（）；$.ajax（{type:“POST”，数据：sdata，url:，success:function（data）{$（'#baseModal xs.modal content'）.html（data）；}}）；返回false；}）
hi Lamzozoo，我尝试了你的代码，但是提交按钮消失了，回车键仍然不起作用hi Lamzozoo，提交按钮现在出现了，但是回车键仍然不起作用。你能将完整的表单视图添加到问题中吗？不仅仅是按钮本身。我已经编辑了问题，请现在检查一下，我已经包含了你的代码ady.谢谢：）所以如果你已经有了一个按钮，那么你不需要在按钮周围使用表单包装器，只要按钮就可以了！编辑了我的答案！
public function change_password ()
{
    if($this->input->post('submit_btn')){
        $this->session->set_flashdata('success','Password Changed Successfully');
        redirect('dashboard');
    }   
    // Set up the form
    $rules = array(

        'newpassword' => array(
            'field' => 'newpassword', 
            'label' => 'New Password', 
            'rules' => 'trim|required|min_length[6]|xss_clean|check_pass'
        ), 
        'conpassword' => array(
            'field' => 'conpassword', 
            'label' => 'Confirm Password', 
            'rules' => 'trim|required|min_length[6]|matches[newpassword]|xss_clean|check_pass'
        ), 
    );


    $this->form_validation->set_rules($rules);
    $this->form_validation->set_message('required', 'this field is required');

    // Process the form
    if ($this->form_validation->run() == TRUE) {
        $password = $this->input->post("newpassword");
        $userid = $this->session->userdata("id");               
        if($this->user_m->change_password($password, $userid)){
            $this->data['message'] = 'password changed successfully';
            //$this->data['subview'] = 'home/index';
            //$this->load->view('_layout_main_1', $this->data);
        }else{
            $this->data['message'] = 'password must have at least one uppercase letter and a number';
        }               
        $this->data['refresh'] = true;
    }

    // Load view

    $this->load->view('home/change_password', $this->data);
}

<?php echo form_open('',array('class'=>'ajaxForm')); ?>
<div class="modal-header">
    <a class="modal-close-med" data-dismiss="modal" aria-hidden="true"><img src="<?php echo base_url(); ?>img/close.png"></a>
    <h3 class="modal-title no-margin margin-bottom-5p-min">Change Password</h3>
</div>
<div class="modal-body">
    <?php if(isset($message))echo '<span class="text-success txt-upper" style="margin-left:2rem;">'. $message .'</span>';?>

    <fieldset class="table ">
        <div class="form-group">
            <?php $class = form_error('newpassword')?"input-error":"" ?>
            <div  class="col-md-12" style="margin: 10px 0"><?php echo form_password('newpassword','','class="form-control margin-both-0 '. $class.'" id="newpassword"  placeholder="New Password" autocomplete="off"'); ?><?php echo form_error('newpassword'); ?></div>
        </div>
        <div class="form-group">
            <?php $class = form_error('conpassword')?"input-error":"" ?>
            <div class="col-md-12 " style="margin: 10px 0"><?php echo form_password('conpassword','','class="form-control  margin-both-0 '. $class.'" id="conpassword"  placeholder="Confirm Password" autocomplete="off"'); ?><?php echo form_error('conpassword'); ?></div>
        </div>
    </fieldset>
</div>
<div class="modal-footer">
    <?php echo form_submit('submit_btn', 'Change Password', 'class="submit btn btn-success margin-left-4p pad-1-rem margin-bottom-10"'); ?>
</div>
<?php echo form_close();?>

<script>
    $(function() {
        $('.ajaxForm').on('submit', function(e) {
            // ex.: $.post(...
            console.log(e);
            e.preventDefault();
        })
    })
</script>