ul#main_nav a { display: block; height:38px; text-indent: -9999px; text-decoration: none; overflow: hidden; }

/*NAVIGATION*/

ul#main_nav  { list-style-type:none; position:relative; width:984px; height:38px; margin:0; padding:0; z-index: 8; background:url(../images/nav_bg.png) }
ul#main_nav li { padding: 0; margin: 0; display: block; float: left; }
ul#main_nav a { display: block; height:38px; text-decoration: none; overflow: hidden; }

li#nm_1 { position:absolute; top: 0px; left:0px; width: 93px; height:38px; background:url(../images/bt_home.png) no-repeat 0 0; }
li#nm_2 { position:absolute; top: 0px; left:93px; width: 107px; height:38px; background:url(../images/bt_stories.png) no-repeat 0 0; }
li#nm_3 { position:absolute; top: 0px; left:200px; width: 138px; height:38px; background:url(../images/bt_hauntings.png) no-repeat 0 0; }
li#nm_4 { position:absolute; top: 0px; left:338px; width: 142px; height:38px; background:url(../images/bt_fieldguide.png) no-repeat 0 0; }
li#nm_5 { position:absolute; top: 0px; left:480px; width: 110px; height:38px; background:url(../images/bt_experts.png) no-repeat 0 0; }
li#nm_6 { position:absolute; top: 0px; left:590px; width: 90px; height:38px; background:url(../images/bt_news.png) no-repeat 0 0; }
li#nm_7 { position:absolute; top: 0px; left:680px; width: 96px; height:38px; background:url(../images/bt_books.png) no-repeat 0 0; }
li#nm_8 { position:absolute; top: 0px; left:776px; width: 208px; height:38px; background:url(../images/bt_ent.png) no-repeat 0 0; }

li#nm_1 a:hover { background:url(../images/bt_home.png) no-repeat -93px 0px;}
li#nm_2 a:hover { background:url(../images/bt_stories.png) no-repeat -107px 0px;}
li#nm_3 a:hover { background:url(../images/bt_hauntings.png) no-repeat -138px 0px;}
li#nm_4 a:hover { background:url(../images/bt_fieldguide.png) no-repeat -142px 0px;}
li#nm_5 a:hover { background:url(../images/bt_experts.png) no-repeat -110px 0px;}
li#nm_6 a:hover { background:url(../images/bt_news.png) no-repeat -90px 0px;}
li#nm_7 a:hover { background:url(../images/bt_books.png) no-repeat -96px 0px;}
li#nm_8 a:hover { background:url(../images/bt_ent.png) no-repeat -208px 0px;}