closing #51. Added img_id and img_name in capcha helper

Signed-off-by: Preetham <me@preetham.in>
diff --git a/system/helpers/captcha_helper.php b/system/helpers/captcha_helper.php
index 2ffa86d..a105b34 100644
--- a/system/helpers/captcha_helper.php
+++ b/system/helpers/captcha_helper.php
@@ -72,6 +72,8 @@
 			'expiration'	=> 7200,
 			'word_length'	=> 8,
 			'font_size'	=> 16,
+			'img_id'	=> '',
+			'img_name'	=> '',
 			'pool'		=> '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
 			'colors'	=> array(
 				'background'	=> array(255,255,255),
@@ -244,7 +246,7 @@
 			return FALSE;
 		}
 
-		$img = '<img src="'.$img_url.$img_filename.'" style="width: '.$img_width.'; height: '.$img_height .'; border: 0;" alt=" " />';
+		$img = '<img id="'.$img_id.'" name="'.$img_name.'" src="'.$img_url.$img_filename.'" style="width: '.$img_width.'; height: '.$img_height .'; border: 0;" alt=" " />';
 		ImageDestroy($im);
 
 		return array('word' => $word, 'time' => $now, 'image' => $img, 'filename' => $img_filename);