ul#mainNavTheBigPicture {padding:0; margin:0;}
ul#mainNavTheBigPicture li {padding:0; margin:0; list-style:none; float:left; width:156px; height:31px;}
ul#mainNavTheBigPicture li a {padding:0; margin:0; list-style:none; float:left; width:156px; height:31px; background:url('/images/bgNav-thebigpicture.png') no-repeat}
ul#mainNavTheBigPicture li a:hover, ul#mainNavTheBigPicture li.selected a {background-position:0 -32px;}
ul#mainNavTheBigPicture li a span {display:block; text-indent:-9999px;}

ul#mainNavTheBigPicture li#about a {background-position:-624px 0;}
ul#mainNavTheBigPicture li#about a:hover, ul#mainNavTheBigPicture li#about.selected a {background-position:-624px -32px;}

ul#mainNavTheBigPicture li#teachers-area a {background-position:-312px 0;}
ul#mainNavTheBigPicture li#teachers-area a:hover, ul#mainNavTheBigPicture li#teachers-area.selected a {background-position:-312px -32px;}

ul#mainNavTheBigPicture li#students-area a {background-position:-468px 0;}
ul#mainNavTheBigPicture li#students-area a:hover, ul#mainNavTheBigPicture li#students-area.selected a {background-position:-468px -32px;}