The BANDPLAN "widget" shows all amateur band frequency allocations between 160 meters and 2 meters inclusive. I have omitted the so-called "60-meter band," as that is just a set of 5 channels, and many modern ham transceivers do not include it (for instance, my Ten-Tec Omni VI+ does not tune 60-meters).
The idea behind this widget was to present each band in a large enough format to be easily readable, yet still maintain a reasonably compact form factor: thus, the use of tabs and displaying only a single band at a time.
You can add this widget to your own website by including the HTML code below on your own webpage. The code should be inserted at the point where you wish the widget to appear. Note that normally this will be somewhere in the index.html or index.php file, whichever your site uses.
<link rel="stylesheet" type="text/css" href="http://www.w4zd.net/bandplan/bandplan.css" />