jQuery在重新检查时验证自定义成功消息重复

So I have this jQuery Validation plugin, and it has a custom success message. The form validates automatically, because it's attached to the body. The problem comes when I wish to check the variable to see if the form is valid. That revalidates it, which ends up adding an extra success message (image in my case) which is undesired. I want the success message to only appear once, regardless of the fact it is validated multiple times. Here's my code:So I have this jQuery Validation plugin, and it