jQuery 'Object doesn't support this property or method

I have a javascript file with function calls in it, but I keep getting the message Object doesn’t support this property or method. The funny thing is though that most functions in this file are form validation related, ie


$(document).ready(function() {
	$("#checkinForm").validate({meta: "validate"});
});
$(document).ready(function() {
	$("#signupForm").validate({meta: "validate"});
});

etc...

There are just two other functions in. If I remove those two functions, I keep getting the message but the validation is working fine.

Just solved the problem. Was a typo.

What can be the source of this?