You can learn everything you need to know about the
Van 't Kruijs Opening
on wikipedia:
The opening 1.e3 is not popular according to ChessBase; it ranks eleventh in popularity out of the twenty possible first moves. It releases the king's bishop, and makes a modest claim of the centre, but the move is somewhat passive. The queen's bishop's development is somewhat hindered by the pawn on e3, and White usually wants to take more than a modest stake of the centre.
The full wikipedia entry includes links to games by Nimzowitsch, a list of the main lines, study references and so on. What more could you want?
On other chess websites this opening is the most common but I don no how to play against it..Please help...A game or link to a site would do as well.