Gebruik van getAttributeNode() wordt niet meer ondersteund. Gebruik in plaats daarvan getAttribute(). mootools-core.js:108:287
Which translates as: getAttributeNode() is no longer supported, please use getAttribute instead. And it seems to be related to Mootools.
When I select the Joomla core template Protostar the message disappears. So I thought I'd ask about this message in the T3 forum as a first step to solving this issue.
As a side note: I thought that Mootools is not used by Joomla anymore. This message suggests that it is used by T3. Is it?
Kind regards, Frits