Validating issue

Hi,
I'm validating http://www.graszodengroningen.com and i received the following error:
there is no attribute "target"…pilot: Beoordeling 7.9 van 10" target="_blank"><img src=" http://www.graszodendrenthe.com " />What is wrong? How can I make sure that the attribute target will be correct?Thanks in advance,Pieter de Vries
 		 	   		  

Received on Wednesday, 29 May 2013 21:05:40 UTC