need use radio input
checked upload or import
<div><input name="attach" type="radio" value="none"> None</div>
<div><input name="attach" type="radio" value="import"> Import</div>
<div><input name="attach" type="radio" value="upload" checked> Upload</div>and use redirect for action
switch ($_POST['attach']) {
default :
break;
case 'upload' :
// header('Location: PATH TO UPLOAD');
exit;
break;
case 'import' :
// Location to file import
includes/file_import
break;
}