Hi Harish,
This has little to do with struts but have you tried using tools like "firebug" from firefox. Have you verified the HTML code using view source after rendering?
Looking into the code what I could see is most probably the CSS file is not picked due to the href path
1. Why would you want to give a url value? why dont you give it directly something like
2.Verify where if the css file is located in the right place as mentioned.