Ciao.
Puoi provare con questo:
http://extensions.joomla.org/extensions/access-a-security/captcha/1211
Luca
dopo averlo scaricato, provo ad installarlo e mi esce scritto questo:
* JInstaller::install: ERRORE: Impossibile trovare un file XML di installazione Joomla in questo pacchetto.
* Unable to detect manifest file
Messaggio
* Installazione componente: Errore
Parse error: syntax error, unexpected '[' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1
Parse error: syntax error, unexpected '[' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1
Parse error: syntax error, unexpected '[' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(302) : eval()'d code on line 1
Parse error: syntax error, unexpected '[' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(305) : eval()'d code on line 1
Parse error: syntax error, unexpected '[' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1
Parse error: syntax error, unexpected '[' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1
Parse error: syntax error, unexpected '[' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1
Parse error: syntax error, unexpected '[' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1
Parse error: syntax error, unexpected T_OBJECT_OPERATOR, expecting T_STRING or T_VARIABLE or '{' or '$' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1
Parse error: syntax error, unexpected T_OBJECT_OPERATOR, expecting T_STRING or T_VARIABLE or '{' or '$' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1
Parse error: syntax error, unexpected T_OBJECT_OPERATOR, expecting T_STRING or T_VARIABLE or '{' or '$' in /membri/disneychannel/libraries/joomla/utilities/simplexml.php(335) : eval()'d code on line 1