How to Validate your CSS Pages?

To validate your CSS page, do the following:
1. Gather the URLs of the your pages.
2.Locate the website of the W3C on the Internet. The W3C is an organization set up to help designers with universal design standards for the web.
3.Click on the 'CSS Validator' link, on the home page’s left side.
4.Put any of your URLs in the text box available in the Validator page, and click the Check button.
5. Note down any errors that appear on the page and look at the code modules that the validator referenced.

you can also try this one..this is for add ons for firefox
http://mashable.com/...design-add-ons/

thanks for the add on anjaneyabattu