Never implement ANY cloaking methods on your site

Site cloaking was popular a couple years ago. It means show one version of content to your visitors and show a different version of content to the search engine spiders. There are of course legitimate reasons for doing this. But due to popular usage by spammer sites, it is now considered instant ban if you cloak your site this way. Do not think the search engines will not find out. Google now frequently send out unknown bots from unknown ips for the sole purpose of detecting cloaked sites.