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Top Forums UNIX for Dummies Questions & Answers onChange + javascript in perl CGI - question Post 302218826 by matrixmadhan on Sunday 27th of July 2008 07:04:57 AM
Old 07-27-2008
onChange + javascript in perl CGI - question

Hello all,

Am trying to include a onChange java script to my perl CGI application which uses POST method to upload files to file_server

This is how I embedded javascript in the perl code that renders CGI application

Code:
print qq|
  <script type="text/javascript" src="display.js">
  </script>
  |;

Contents of display javascript are :

Code:
function changeDispatch(newLink) {
  if ( newLink != null ) {
    document.location.href = newLink;
  }
}

This is the popup menu, when an item is selected from the list it should automatically trigger the action designation instead of a separate "GO" ( submit ) button for each of the popup menu that I have got.

Code:
print $cgi->popup_menu(-name=>'fruits',
                         -values=>$fruits_arr,
                         -onChange=>"changeDispatch('$arg')");

Here in '$arg' if am able to store the selected value from the popup_menu, then its quite easy to formulate a string and pass it to changedDispatch in javascript.
But am not able to retrieve any such data

Whats happening :
If I click on any of the fruits say, "apple" the onClick effect is happening and it comes to the same initial page. If that is, fruits.cgi once I click that - it again comes to fruits.cgi as though it has been loaded for the first time

What I want to happen :
Based on the onClick event, I have other functions to be dispatched via GUI. That would seem to happen only when I know what option is clicked.

I accept that am not that good when it comes to GUI design or adding effects to that.

I have seen several website doing this, it should be something very easy for those who had already worked on this.
Could you please provide some pointers ?

thanks Smilie

Last edited by matrixmadhan; 07-27-2008 at 09:09 AM.. Reason: added more relevant information
 

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CGI::Compile(3pm)					User Contributed Perl Documentation					 CGI::Compile(3pm)

NAME
CGI::Compile - Compile .cgi scripts to a code reference like ModPerl::Registry SYNOPSIS
use CGI::Compile; my $sub = CGI::Compile->compile("/path/to/script.cgi"); DESCRIPTION
CGI::Compile is an utility to compile CGI scripts into a code reference that can run many times on its own namespace, as long as the script is ready to run on a persistent environment. NOTE: for best results, load CGI::Compile before any modules used by your CGIs. RUN ON PSGI
Combined with CGI::Emulate::PSGI, your CGI script can be turned into a persistent PSGI application like: use CGI::Emulate::PSGI; use CGI::Compile; my $cgi_script = "/path/to/foo.cgi"; my $sub = CGI::Compile->compile($cgi_script); my $app = CGI::Emulate::PSGI->handler($sub); # $app is a PSGI application CAVEATS
If your CGI script has a subroutine that references the lexical scope variable outside the subroutine, you'll see warnings such as: Variable "$q" is not available at ... Variable "$counter" will not stay shared at ... This is due to the way this module compiles the whole script into a big "sub". To solve this, you have to update your code to pass around the lexical variables, or replace "my" with "our". See also <http://perl.apache.org/docs/1.0/guide/porting.html#The_First_Mystery> for more details. AUTHOR
Tatsuhiko Miyagawa <miyagawa@bulknews.net> CONTRIBUTORS
Rafael Kitover <rkitover@cpan.org> Hans Dieter Pearcey <hdp@cpan.org> COPYRIGHT &; LICENSE Copyright (c) 2009 Tatsuhiko Miyagawa <miyagawa@bulknews.net> This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
ModPerl::RegistryCooker CGI::Emulate::PSGI perl v5.14.2 2011-05-24 CGI::Compile(3pm)
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