Google has just launched a new search service that only links to XHTML (Extensible Hypertext Markup Language) pages that have been formatted for display in small screens of mobile devices like PDA and mobile phone. Mobile users can already perform searches from mobile device with a Web browser and enter a query in the search box at Google.com or Google.com/xhtml. For your information, this blog is written in XHTML.

This week, Google added a new “Mobile Web” option to the pages. When this button is selected, users will only receive links to XHTML pages that have been formatted for the smaller displays of mobile devices.

In fact, Google also offers a similar Web search service for phones that support WML (Wireless Markup Language) instead of XHTML (Extensible Hypertext Markup Language). The WML search service can be reached at Google.com/wml. However, WML doesn’t support images, so searching for pictures isn’t possible using this service. Unfortunately, the newly launched Mobile Web option is not available on WML phones.

If a user is unsure which markup language his phone supports, Google suggests trying both Google.com/xhtml and Google.com/wml to see which one works.