function submitForm() {
    var fileInput = document.getElementById('csvFile');
    var processingMsg = document.getElementById('processingMsg');

    if (fileInput.files.length === 0) {
        alert('Please select a CSV file.');
        return;
    }

    var formData = new FormData();
    formData.append('csvFile', fileInput.files[0]);

    // Show processing message
    document.getElementById('uploadForm').classList.add('hidden');
    processingMsg.classList.remove('hidden');

    // Simulate backend processing (replace with actual AJAX call)
    setTimeout(function() {
        // After processing (simulated with setTimeout), show success message
        processingMsg.innerHTML = '<p>File processed successfully. <a href="#" onclick="downloadProcessedFile()">Download processed file</a></p>';
    }, 2000);
}

function downloadProcessedFile() {
    // Here you can add code to download the processed file
    alert('Downloading processed file...');
    // Replace this alert with your actual download logic
}