If you must accomplish a redirect with POST rather than GET, then
JavaScript is the only known way to do it.
Say normally submit a form to page B, but need to give the user the
option to submit it to page C instead. Here's a code snippet which
creates a URL which when clicked, will submit a form to the current
page, rather than whereever the form's action property would normally
send it:
set submit_form_to_self_link "
<a href="javascript:submit_form_to_self()">re-calculate</a>
<script language=javascript>
function submit_form_to_self() {
document.[export_var name_of_form].action = '[ns_conn url]?[ns_conn query]';
document.[export_var name_of_form].submit();
}
</script>
<noscript></noscript>
"
You'll want to avoid doing things like using ns_returnredirect to
redirect to a page that then does something and uses JavaScript to
automatically submit a form, as the user will sit there staring at the
page for several seconds before the auto-submit finally takes effect.
But for user-initiated form submissions (clicking on a link or form
button), it is fine.
(Actually, you'll want to avoid ever doing more than one redirect in a
row, or redirecting with a very long URL, as Internet Explorer will
often refuse to follow it - and for IE 5.x, its error message will say
that your site is down, not that IE refused to follow the redirect.)
