Question

I currently have a form that lets a user select an image. After the image has been selected they need to click the submit button. I’m using jquery so the call ends up looking like this:

$('#image_form').ajaxForm(function(data) { 
   // do some stuff
});

here is the HTML:

<form id="image_form" enctype="multipart/form-data" action="load_photo.php" method="post" >
    <input type="hidden" name="MAX_FILE_SIZE" value="8000000" />

    <table>    
        <tr>
            <td>
                <label for="mapimage">Select an image:</label>
            </td>
        </tr>
        <tr>
            <td>
                <input name="file" type="file" id="file"/>
            </td>
        </tr>
        <tr>
            <td>
                <input type="submit" value="Update" name="update_photo" id="update_photo"/>
            </td>
        </tr>
    </table>
</form>

Is it possible to trigger this form action after a user has browsed to a photo and selected it? Ideally they would not have to click the submit button.

Answer 1

When a file has been selected, the change event fires on the input[type=file] element, so just listen for that.

$('#file').change(function(e){
    // do something after a file is selected
    // maybe submit the file?
    e.target.form.submit();
});