$(document).ready(function(){
    lastBlock = $("#openfirst");
    maxWidth = 419;
    minWidth = 31;	

    $("ul li a").hover(function()
    {
        $(lastBlock).animate({width: minWidth+"px"}, { queue:false, duration:300 });
		$(this).animate({width: maxWidth+"px"}, { queue:false, duration:300});
		lastBlock = this;
	}

);
});