Graham Waplocus For css or javascript you could use

<link rel="stylesheet" href="/EXT/<xt:get_device_template />.css" />

or for javascript

<script src="/EXT/<xt:get_device_template />.js" /></script>

just use lowercase web.css mobile.js etc no xtscript required if you want the 'touch' option as well you will need to use the blog trick