$(document).ready(function(){
    lastBlock = $("#A1");
    maxWidth = 560;
    minWidth = 40;	

    $("ul.accordeon li").hover(
      function(){
        $(lastBlock).animate({width: minWidth+"px"}, { queue:false, duration:400 });
	$(this).animate({width: maxWidth+"px"}, { queue:false, duration:400});
	lastBlock = this;
      }
    );
});