The digital media unit of French media giant Lagardere has bought French online advertising company ID Regie for an undisclosed sum, in a bid to strengthen the position of its Lagardere Publicite unit in the internet market. The firm sells ad space for over 30 French websites including Price Minister, Alapage, LDLC and Top Achat, and in 2006 doubled its gross operating profit to 1.1 million Euro, reports AFX.