Jquery (...).validate Is Not A Function

My browser console is telling me that: $(...).validate is not a function I am simply trying to reproduce this example, but it is not working, and I've no idea why. Looking at the

Solution 1:

You need to include jQuery validation plugin:

<scripttype="text/javascript"src="path-to/jquery-validate.js"></script>

download it and attach to your project.

Solution 2:

The example you point to uses jQuery validate plugin, you've not included that in your example.