$(document).ready(function(){
	lastBlock = $(".ouvert");
	maxWidth = 565;
	minWidth = 40;	

	$("#livres > .livre").hover(
	  function(){
		$(lastBlock).animate({width: minWidth+"px"}, { queue:false, duration:400 });
	$(this).animate({width: maxWidth+"px"}, { queue:false, duration:400});
	lastBlock = this;
	  }
	);
});