ImageField, alt,title

function theme_imagefield_image($file, $alt = '', $title = '', $attributes = null, $getsize = true) {
  $file = (array)$file;
  if (!is_file($file['filepath'])) {
    return '<!-- file not found: '. $file['filepath'] .' -->';
  }
  $image_attributes = array();
  if (!$getsize || (list($width, $height, $type, $image_attributes) = @getimagesize($file['filepath']))) {
    $attributes = drupal_attributes($attributes);
    $alt = empty($alt) ? $file['alt'] : $alt;
    $title = empty($title) ? $file['title'] : $title;
    $url = file_create_url($file['filepath']);
    return '<img src="'. check_url($url) .'" alt="'.
        check_plain($alt) .'" title="'. check_plain($title) .'" '. $image_attributes . $attributes .' />';
  }
  return '<!-- could not get imagesize, possibly corrupt or non image. '. $file['filepath'] .' -->';
}