$(document).ready(function() {  
	$('a#logo').append('<span class="hoverBack"></span>').each(function () {									 		  var $span = $('> span', this).css('opacity', 0);
			  $(this).hover(function () {
				$span.stop().fadeTo(250, 1);
			  }, function () {
				$span.stop().fadeTo(500, 0);
			  });
	});
	$('a#logo').append('<span class="currentBack"></span></span>');		
});