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In this video, Ralph demonstrates how to use JavaScript to check a basic form for empty text strings. He starts with a web page, adding a simple form with the method set to POST and a dummy action. The form includes two text boxes: one for the first name and the other for the last name, each with corresponding labels and input fields. After creating the first input box for the first name, he uses a break tag to format the layout. He then duplicates the setup for the last name and adds a submit button labeled "Send Data." To enhance the structure, he wraps the form elements in fieldset tags for better validation.