div#nav { 
  width: 700px; 
  margin: 0 auto; 
  margin-top: 170px; 
}

  div#nav div { 
    float: left; 
    margin-left: 20px; 
    background: url(../img/layout/intro-nav-background.png) no-repeat top left; 
    filter:alpha(opacity=0);-moz-opacity:.0;opacity:.0;
  }
    
    div#nav div a { 
      display: block; 
      width: 200px; 
      height: 45px; 
      padding-top: 230px;
      text-align: center;      
      text-decoration: none;
      color: #fff;
    }
    
    #nav li a span {
      height: 45px; line-height: 18px;
    }
    
    div#nav1 a { background: url(../img/groups/1.jpg) no-repeat center 12px; }
    div#nav2 a { background: url(../img/groups/2.jpg) no-repeat center 12px; }
    div#nav3 a { background: url(../img/groups/3.jpg) no-repeat center 12px; }
    
div#footer { display: none; }