Can anyone tell me how to insert a HTML file in to another HTML file?
Say, I am having an HTML file viz. Container.html and another file named Source.html, now I want to include Source.html into Container.html, so that if I make a change in Source.html it reflects to Container.html.

Thanks in advance.:)

The common method of doing htis is called Server Side Includes (SSI's) see http://bignosebird.com/ssi.shtml you can also do this to some extent on the client side - see http://builder.com.com/5100-6371-5172019-1-1.html. Another server side option would be to have your server side code open the file in question adn the read it and print it out to the response buffer alongside the rest of the outputted HTML.