but if I can get the values from html page by using following lines

my $query = new CGI;
my $sirName = $query ->param("sirName");
[download]

why I cant do the same to pass values from perl to html...

If we are to interpret your statement literally, gellyfish is correct, the above lines of code will not send a query string from your perl code to your html page. However, gellyfish is also mistaken regarding HTML; it is entirely possible to pass a query string between pages using either the GET or POST methods, which CGI fully supports.

If you want your cgi to work as a redirection page, merely forwarding the query string, this is possible as well. You can either append the query string to the redirect and send the form via GET or you can try to use POST. While I could not find any equivalent to Javascript's .submit() method in the CGI:: modules, you can accomplish this by creating your own user agent.

Both methods are documented in Chapter 20, Section 2 of The Perl Cookbook.

It looks like a lot of work now, but trust us, creating templates and gaining an understanding of the technology you are using will save you a lot of time.