$(document).ready(function(){
    lastBlock = $("#first-box");
    maxWidth = 300;
    minWidth = 120;	

    $("ul#accordian li a").hover(
      function(){
        $(lastBlock).animate({width: minWidth+"px"}, { queue:false, duration:500 });
	$(this).animate({width: maxWidth+"px"}, { queue:false, duration:500});
	lastBlock = this;
      }
    );
});