1 files changed, 3 insertions, 1 deletions

diff --git a/encoding.js b/encoding.js
index d263fd1..ff7a99b 100644
--- a/encoding.js
+++ b/encoding.js
@@ -3,6 +3,8 @@ function decode_charsets( str, encoding ) {
 
   if( encoding == "iso-2022-jp" ) {
     return decode_jis( str );
+  } else if( encoding == "gb2312" ) {
+    return decode_gb2312( str );
   }
 
   map = encodings[encoding] || enc_8859_1;
@@ -68,7 +70,7 @@ function decode_header( line ) {
     }
            
     dec_word = enc_word[2] == 'Q' ? decode_quotedprintable( enc_word[3] ) : decode_base64( enc_word[3] );
-    line = line.replace( /=\?\S+\?(?:Q|B)\?\S+\?=/, decode_charsets( dec_word, enc_word[1] ) );
+    line = line.replace( /=\?\S+\?(?:Q|B)\?\S+\?=/, decode_charsets( dec_word, enc_word[1].toLowerCase() ) );
   } 
 
   return line;