[jQuery] Validate Plugin - On Error?

[jQuery] Validate Plugin - On Error?


I need to perform a custom action when it turns invalid.
Currently, I have this:
success: function(label) {

label.html("good").parent('div').removeClass('bad').addClass('good');
},
Ideally, I would just do:
failure: function(label) {
// set   as text for IE

label.html("bad").parent('div').removeClass('good').addClass('bad');
}
But that doesn't work.
How can I perform this action when the script detects that something
is amiss?