.nav-center {
    margin:0;
    float:none;
}
  .navbar-nav {
    float:none;}


.navbar .navbar-nav {
  display: inline-block;
  float: none;
  vertical-align: top;
}

.navbar .navbar-collapse {
  text-align: center;
}


          .navbar-nav li a{
	background:aqua
}
 


.hid { visibility: hidden; }

.sho { visibility: visible !important; }