User Resolution Prompt?

[colicab-d]

Would it be possible to detect if a user is viewing the site at say a certain screen resolution and if under it or over ( i dunno ) send them to a page that prompts them to change it?

of course the option to not show the screen again could be ticked so they dont get the message each time they visit

this would be real handy so as skinners could make layouts for set widths and be safe in the knowledge that the user has a prompt to fix in case theyere using a smaller res