but still i am not able to link between perl and java script. my new sample code looks like this :

Your new sample code is also an incomplete fragment with all context missing

You don't really "link" perl and javascript, you let perl programs talk to javascript programs, and that is done through HTTP

See these links in Re^5: display new options based on checkbox inputs ...
Re: To call a .pl file when a button is pressed on a GUI created using Perl CGI (webserver)
Re: To call a .pl file when a button is pressed on a GUI created using Perl CGI
Mojolicious::Lite +and jQuery +AJAX + Mojo::Template
Re: calling menu bar creating code from another cgi/pl code (mojo)

If this isn't enough info or you still don't get it, you'll have to explain what that is exactly (what you know, what you're not understanding)

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