Modal windows are used quite frequently in our HTML development. Used for many different areas of our websites, we can use them for; Login Forms, advertisements, notifications, specials, links to areas, etc. Most developers use them by incorporating JavaScript into their sites not realizing that with the new properties in CSS3, that is no longer necessary. We can develop and deploy pure HTML5 and CSS3 modal windows without any additional code. Developing in this way supports the “Best Practices” of progressive enhancement on our sites.