如何在弹出式composeMailData - Vtiger上显示相关邮件

// 示例代码：创建模态窗口
function openModal() {
    document.getElementById('myModal').style.display = 'block';
}

// 关闭模态窗口
function closeModal() {
    document.getElementById('myModal').style.display = 'none';
}

<!-- 示例HTML代码 -->
<div id="myModal" class="modal">
    <div class="modal-content">
        <span class="close" onclick="closeModal()">&times;</span>
        <h2>Compose Mail</h2>
        <form id="mailForm">
            <!-- 邮件内容表单 -->
        </form>
    </div>
</div>

// 示例代码：提交邮件数据
document.getElementById('mailForm').addEventListener('submit', function(event) {
    event.preventDefault();
    fetch('/api/composeMail', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: JSON.stringify({
            to: document.getElementById('to').value,
            subject: document.getElementById('subject').value,
            body: document.getElementById('body').value
        })
    })
    .then(response => response.json())
    .then(data => {
        if (data.success) {
            alert('Mail sent successfully!');
        } else {
            alert('Failed to send mail: ' + data.message);
        }
    })
    .catch(error => {
        console.error('Error:', error);
    });
});