$(document).ready(function(){
  	lastBlock = $("#a1");
    maxWidth = 210;
	minWidth = 90;	
    
    $("ul li a").hover(	
		function(){			
			$(lastBlock).animate({width: minWidth+"px"}, { queue:false, duration:400 });
			$(this).animate({width: maxWidth+"px"}, { queue:false, duration:400});
			currentBlock = this;				
			lastBlock = this;			
	    }
	);
  });