/* POSITIONS NAVIGATION ELEMENTS */
#main_navigation a { 
width:127px; height:41px;
background-position:left top;
display:block;
float:left;
}

/* CHANGES IMAGE ON HOVER */
#main_navigation a:hover { background-position:left -41px; }

/* SETS DEFAULT IMAGE FOR PAGE */
#home a.rollover_home, #vision a.rollover_vision, #details a.rollover_details, #contribute a.rollover_contribute, #register a.rollover_register, #archive a.rollover_archive { background-position:left bottom; }

/* NAVIGATION IMAGES */
.rollover_home { background:url(../images/navigation/all/home.png) no-repeat; }
.rollover_vision { background:url(../images/navigation/all/vision.png) no-repeat; }
.rollover_details {	background:url(../images/navigation/all/details.png) no-repeat;	}
.rollover_contribute {	background:url(../images/navigation/all/contribute.png) no-repeat; }
.rollover_register { background:url(../images/navigation/all/register.png) no-repeat; }
.rollover_archive {	background:url(../images/navigation/all/archive.png) no-repeat;	}