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Full Discussion: onChange + javascript in perl CGI - question
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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LEARN ABOUT DEBIAN

cgi_parse

cgi_parse(3)							     cgi/cgi.h							      cgi_parse(3)

NAME

       cgi_parse  - Parse incoming CGI data

SYNOPSIS

       #include <cgi/cgi.h>

       NEOERR *cgi_parse (CGI *cgi);

ARGUMENTS

       cgi - a pointer to a CGI pointer

DESCRIPTION

       We  split  cgi_init  into  two  sections,  one  that parses	     just the basics, and the second is cgi_parse.  cgi_parse		is
       responsible for parsing the entity body of the HTTP	     request.	This  payload  is  typically  only  sent  (expected)		on
       POST/PUT  requests,  but generally this is called on	      all incoming requests.  This function walks the list of		registered
       parse callbacks (see cgi_register_parse_cb),	      and if none of those matches or handles the request, it

       handlers:	     POST w/ application/x-www-form-urlencoded		   POST w/ application/form-data	     PUT  w/  any  content
       type	       In  general,  if  there	is  no	Content-Length,  then		 cgi_parse  ignores  the  payload  and	doesn't  raise	an
		 error.

RETURN VALUE

       Either data populated into files and cgi->hdf, or whatever
       other side effects of your own registered callbacks.

SEE ALSO

       cgi_debug_init(3), cgi_parse(3), cgi_destroy(3),  cgi_js_escape(3),  cgi_html_escape_strfunc(3),  cgi_register_strfuncs(3),  cgi_output(3),
       parse_rfc2388(3), cgi_url_validate(3), open_upload(3), cgi_cs_init(3), cgi_url_escape_more(3), cgi_html_strip_strfunc(3), cgi_neo_error(3),
       cgi_redirect(3), cgi_filehandle(3), cgi_register_parse_cb(3),  cgi_url_escape(3),  cgi_init(3),	cgi_redirect_uri(3),  cgi_cookie_clear(3),
       cgi_url_unescape(3),  cgi_vredirect(3),	cgi_display(3),  cgi_html_ws_strip(3),	cgi_error(3), cgi_cookie_set(3), cgi_text_html_strfunc(3),
       cgi_cookie_authority

ClearSilver							   12 July 2007 						      cgi_parse(3)
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