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I need to modify the search module in jommla. When some one type in an string containing 9 numbers i want Joomla to redirect to another site for a search. It should redirect to the following url and open it in a new window. Joomla should go back to home page:

http://w2.brreg.no/enhet/sok/detalj.jsp?orgnr=956753104 <-- joomla search word

Can someone please help me withe this one?