With this technique, convex polygons with any number of sides can be rendered, with a solid color or a background image as the fill.
A simple website that I had put together a while ago, that harbors two simple tools that web designers may find useful. The main site shows you decently current statistics on different screen resolutions that web surfers have nowadays. You could use that as a starting point for deciding on the dimensions for a non-fluid website layout.
setmy.browsersize.com allows you to set your browser size to any desktop resolution without the need for extra add-ons/extensions. This is useful for seeing how users with different desktop resolutions will be viewing your website. whatsmy.browsersize.com tells you your current desktop resolution and browser size along with all the installed popular plug-ins (with links to download sites for missing ones).