This example shows a client-side HTML form that validates an email address and password when the user submits it, displaying any errors in a red list. The code uses jQuery’s `.on('submit')` method to intercept the submission and a series of regular expressions to test the email format, numeric digits, a capital letter, and a minimum length of eight characters. Error messages are pushed into an array and appended as list items to a `<ul>` element, with styling from a simple CSS rule.