Easy setup, create a form with a class of 'validate'.
Then give each form element you wish to validate a class of validate along with one of these choices...
Then add the following to your global javascript file....
$(document).ready(function() {
$("form.validate").validate();
});
See the form below for an example. Styles for error messages can be edited too.
feel free to use the code. A link back would be nice