I'm not sure what's going on, from your description, but I'm guessing you need to escape what's in $joined. CGI has an escapeHTML function that would help with that. 

use CGI;

print qq{<form action='/cgi-bin/opal/display_seview.cgi' method='post'
+ target='new'>
<input type='hidden' name='text' value='@{ [ CGI->escapeHTML($joined) 
+] }'/>
<input type='hidden' name='header' value='@{ [ CGI->escapeHTML($query)
+ ] }'/>
<input type='hidden' name='sequence' value='@{ [ CGI->escapeHTML($whol
+e_sequence) ] }'/>
<input type='submit' value='View Applet in new window'/></form>
};

[download]

I'd probably use the the function available for making hidden fields, though: 

use CGI;

print qq{<form action='/cgi-bin/opal/display_seview.cgi' method='post'
+ target='new'>};
print CGI->hidden( 'text',     $joined );
print CGI->hidden( 'header',   $query );
print CGI->hidden( 'sequence', $whole_sequence );
print qq{<input type='submit' value='View Applet in new window'/></for
+m>};

[download]

CGI->hidden does the escaping for you (at least when I tried it).

In reply to Re: html form not working by kyle
in thread html form not working by Becky

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.