Hidden elements are pretty easy, and you're using CGI.pm, so getting at them is really easy. Of course, if you know how to make them, spoofing them is also easy, so be aware that this isn't sufficient security unless your users are completely ignorant of View Source. 
# the HTML for making a hidden field
# <input type="hidden" name="submitted" value="1">

if (! defined param('submitted') ) {
    # display a button
} else {
    # don't display the button
}

[download]
To get around the refreshing bit is more difficult. Perhaps the default behavior would be *not* to increment the counter.

(Counters are inaccurate anyway, due to proxies, refreshes, and other things. I think you just picked it as an easy example, though.)

In reply to Re: CGI Refresh question by chromatic
in thread CGI Refresh question by Adam

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