Validation of Text field while Click on submit button


 
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Old 01-27-2012
Validation of Text field while Click on submit button

I am using Perl CGI. I have created some text fields and getting those values.
But i want if user leave the text field blank when he click on submit button then instead of run a script it should give a popup. Please any body suggest me something..???
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cgi_display(3)							     cgi/cgi.h							    cgi_display(3)

NAME
cgi_display - render and display the CGI output to the user SYNOPSIS
#include <cgi/cgi.h> NEOERR *cgi_display (CGI *cgi, const char *cs_file); ARGUMENTS
cgi - a pointer a CGI struct allocated with cgi_init cs_file - a ClearSilver template file DESCRIPTION
cgi_display will render the CS template pointed to by cs_file using the CGI's HDF data set, and send the output to the user. Note that the output is actually rendered into memory first. RETURN VALUE
None 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_display(3)