This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Krishna- If this is a silly answer is because I didn't understand your question. Can't you just create an hyperlink with an target="_blank"? that will open a new window, and since it is a file, a default program will open your pdf/word. If you have to generate your reports in different formats, then have a look at XML FO. HTH
I'm not going to be a Rock Star. I'm going to be a LEGEND! --Freddie Mercury