Move width of the sidebar to show the box and corners
adapting on-the-fly (or change window format or screen resolution).
Scroll to see the transparency of the corners.
<div id="box-1" class="cornerbox">
... content of this box ...
</div>
<div id="box-2" class="cornerbox">
... content of this box ...
</div>
... etc.
1 image of 408 bytes (this one).
22 lines of css (see source code), if separated: 957 bytes.
18 lines of javascript (see source code), if separated 713 bytes.
all together: 2 kB (once dowloaded, recycled in each page).
