js实现带缓动动画的导航栏效果

 话不多说，请看实例代码：

 
  
  
  ul,li { padding: 0; margin: 0; }
  li { list-style: none; }
   #box{
   height: 48px;
   width: 900px;
   background-color: #459DF5;
   margin: 50px auto;
   position: relative;
   }
   #caution {
   width: 150px;
   height: 48px;
   background-color: #4B92D8;
   position: absolute;
   top: 0;
   left: 0;
   }
 #list {
 position: absolute;
 }
   #list li {
   width: 150px;
   height: 48px;
   float: left;
   color: #fff;
   font: 500 20px/48px "微软雅黑";
   text-align: center;
   cursor: pointer;
   }