remove js alert title

mobile/templates/default/invite_friend/invite.php

@@ -125,7 +125,7 @@
                 success: function(res)
                 {
                     if(res.code == 200) {
-                        alert('今日召唤成功，限每人每日召唤一次。');
+                        alert('今日召唤成功，每人每日限召唤一次～');
                         self.off('touchend');
                     }
                     else {