image upload problem

[eluser]Mitja[/eluser]

Code:

<input type="file" name="title_photo" />

Code:

if (!$this->upload->do_upload($field_name))
            {
                $error = array(
                    'error' => $this->upload->display_errors('<div class="warning">', '</div>'),
                    'title' => "Dodaj aranžma"
                );
                
                $this->load->view('admin/arrangements_add', $error);
            }    
            else
            {

if image is not choose i get error that image was not choose. I do now always want to choose image when i am inserting into databse. How can i prevent this that image is not rewuired.

thx