<noscript> which is valid in the HEAD of HTML5.
Alternatives include: Build a separate site for mobile. Or, use media queries to adjust layout, with a polyfill for older browser support, and conditional Internet Explorer comments for Windows phones. Also a factor is how to handle multiple image resolutions without adding file size. Filament Group is advocating context aware image sizing.
- Source & Demo: http://adapt.960.gs/ (resize the page to see it in action)
- License: GPL and MIT