1. While they do use js for some of their page loading, it is not really js-specific. 2. The bar at the top remains in a 'fixed' position over the rest of the

1. While they do use js for some of their page loading, it is not really js-specific. 2. The bar at the top remains in a 'fixed' position over the rest of the page. Hence the 'position: fixed' CSS property that can achieve this effect. The way they do it is with frames, though. 3. Both sites do. It appears that the proxy pulls the markup from the page specified, appends it to their page, and then sends it to you. 4. This is done via js. You could use something like firebug to modify this behavior if you really wanted to.