$(document).ready(function()
{  
  $('ul#topnav li').hover(
    function () {
    $(this).animate({backgroundColor:'#005a94', color:'#ffffff'}, {queue:false,duration:400});
  }, function () {
    $(this).animate({backgroundColor:'#c8d8e0', color:'#000000'}, {queue:false,duration:600});
  });
});