body {
				margin-left:1%;
				margin-right:1%;
			}

  #anniu{
	  position: absolute; 
	  z-index: 1; 
	  left: 12%; 
	  top: 60px;
  }
 
#yejiao
{
   position: absolute; 
  z-index:2;
  top:100%;
}