A note from the editors: While brilliant for its time, this article no longer reflects modern best practices. A rarely discussed advantage of CSS is the ability to layer background images, allowing them to slide over each other to create certain effects. CSS2’s current state requires a separate HTML element for each background image. In many cases, typical markup for common interface components ha
![Sliding Doors of CSS](https://cdn-ak-scissors.b.st-hatena.com/image/square/fbcabecc10cd4dcb1e0f403989e6d435ccb8fe8b/height=288;version=1;width=512/https%3A%2F%2Fi0.wp.com%2Falistapart.com%2Fwp-content%2Fuploads%2F2019%2F03%2Fcropped-icon_navigation-laurel-512.jpg%3Ffit%3D512%252C512%26ssl%3D1)