update index.html

hustcc · Jan 20, 2017 · b4b0285 · b4b0285
1 parent 6eee409
commit b4b0285
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/index.html b/index.html
@@ -98,7 +98,7 @@ <h3>Usage</h3>
       $_('result').innerHTML = xmorse.encode($_('input').value, getoption());
     }
     function decode() {
-      $_('result').innerHTML = xmorse.decode($_('input').value, getoption());
+      $_('result').innerHTML = xmorse.decode($_('input').value, getoption()) || 'Morse code is not valid.';
     }
   </script>
 </body>