my code looks something like this

print header( "text/html" );
print start_html(-title   => "Bookshelf at Reddo Networks",
         -bgcolor => "#ffffff" );
print start_form();

print p("Document nr: ", textfield("doc_nr"));
print p("Document name: ", textfield("doc_name"));
print p("Author: ", popup_menu("author", \@authors));
print p(submit("DO"), reset("clear"));

print end_form(), hr();
print_content();

print end_html;
write_content();

sub print_content {
    open(DAT, "<doc_number.dat");
    @all = <DAT>;
    foreach $b (@all){
    print p($b);
    }
    close(DAT);
}
sub write_content {
    print p("tada");
}

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how do I run the write_content function when the submit button has been pressed

In reply to Executing a function on submit by CyCliC

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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