But how to set the incremented value in the same hidden field (...) The only way I know to set a value for hidden_field is while creating

Well, you are creating the field anew for every page view, anyway (if we're talking about the non-javascript variant, that is), so just set the value as you did the first time...

Or, in case you're using CGI for HTML generation, too (not just for parameter parsing), you can modify the (otherwise sticky) value with: 

$cgi->param('hidden_field', 'new value');

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In reply to Re^3: perl + cgi - onclick generation problem by almut
in thread perl + cgi - onclick generation problem by matrixmadhan

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