It is possible with javascript on the client side or with a server side technology like ASP, ColdFusion, JSP, etc... Go to a site on javascript like www.javascript.com or www.jssource.com and do a search for "sniffer code" or "browser sniffer" if you want it in javascript. Bill
Please note that The Java Ranch has a naming policy, described here and "Krishniah" is not a valid name. Please choose one which meets the requirements. Thanks.