function navbar(which) {
	if (which=="nav02") { /* history over */
		document.getElementById('nav02a').style.visibility="visible";
		document.getElementById('nav02b').style.visibility="visible";
		document.getElementById('nav03a').style.visibility="hidden";
		document.getElementById('nav03b').style.visibility="hidden";
		document.getElementById('nav03c').style.visibility="hidden";
		document.getElementById('nav03d').style.visibility="hidden";
		document.getElementById('nav04a').style.visibility="hidden";
		document.getElementById('nav04b').style.visibility="hidden";
		document.getElementById('nav04c').style.visibility="hidden";
		document.getElementById('nav02adivider').style.visibility="visible";
		document.getElementById('nav03adivider').style.visibility="hidden";
		document.getElementById('nav03bdivider').style.visibility="hidden";
		document.getElementById('nav03cdivider').style.visibility="hidden";
		document.getElementById('nav04adivider').style.visibility="hidden";
		document.getElementById('nav04bdivider').style.visibility="hidden";
			
	}
	else if (which=="nav03") {	/* restaurant over */
		document.getElementById('nav02a').style.visibility="hidden";
		document.getElementById('nav02b').style.visibility="hidden";
		document.getElementById('nav03a').style.visibility="visible";
		document.getElementById('nav03b').style.visibility="visible";
		document.getElementById('nav03c').style.visibility="visible";
		document.getElementById('nav03d').style.visibility="visible";
		document.getElementById('nav04a').style.visibility="hidden";
		document.getElementById('nav04b').style.visibility="hidden";
		document.getElementById('nav04c').style.visibility="hidden";
		document.getElementById('nav02adivider').style.visibility="hidden";
		document.getElementById('nav03adivider').style.visibility="visible";
		document.getElementById('nav03bdivider').style.visibility="visible";
		document.getElementById('nav03cdivider').style.visibility="visible";
		document.getElementById('nav04adivider').style.visibility="hidden";
		document.getElementById('nav04bdivider').style.visibility="hidden";
		
	}
	else if (which=="nav04") { /* red door over */
		document.getElementById('nav02a').style.visibility="hidden";
		document.getElementById('nav02b').style.visibility="hidden";
		document.getElementById('nav03a').style.visibility="hidden";
		document.getElementById('nav03b').style.visibility="hidden";
		document.getElementById('nav03c').style.visibility="hidden";
		document.getElementById('nav03d').style.visibility="hidden";
		document.getElementById('nav04a').style.visibility="visible";
		document.getElementById('nav04b').style.visibility="visible";
		document.getElementById('nav04c').style.visibility="visible";
		document.getElementById('nav02adivider').style.visibility="hidden";
		document.getElementById('nav03adivider').style.visibility="hidden";
		document.getElementById('nav03bdivider').style.visibility="hidden";
		document.getElementById('nav03cdivider').style.visibility="hidden";
		document.getElementById('nav04adivider').style.visibility="visible";
		document.getElementById('nav04bdivider').style.visibility="visible";
		
	}
	else if (which=="" && document.getElementById('history')) {  /* off on history page */
		document.getElementById('nav02a').style.visibility="visible";
		document.getElementById('nav02b').style.visibility="visible";
		document.getElementById('nav03a').style.visibility="hidden";
		document.getElementById('nav03b').style.visibility="hidden";
		document.getElementById('nav03c').style.visibility="hidden";
		document.getElementById('nav03d').style.visibility="hidden";
		document.getElementById('nav04a').style.visibility="hidden";
		document.getElementById('nav04b').style.visibility="hidden";
		document.getElementById('nav04c').style.visibility="hidden";
		document.getElementById('nav02adivider').style.visibility="visible";
		document.getElementById('nav03adivider').style.visibility="hidden";
		document.getElementById('nav03bdivider').style.visibility="hidden";
		document.getElementById('nav03cdivider').style.visibility="hidden";
		document.getElementById('nav04adivider').style.visibility="hidden";
		document.getElementById('nav04bdivider').style.visibility="hidden";
		
	}
	else if (which=="" && document.getElementById('restaurant')) {  /* off on restaurant page */
		document.getElementById('nav02a').style.visibility="hidden";
		document.getElementById('nav02b').style.visibility="hidden";
		document.getElementById('nav03a').style.visibility="visible";
		document.getElementById('nav03b').style.visibility="visible";
		document.getElementById('nav03c').style.visibility="visible";
		document.getElementById('nav03d').style.visibility="visible";
		document.getElementById('nav04a').style.visibility="hidden";
		document.getElementById('nav04b').style.visibility="hidden";
		document.getElementById('nav04c').style.visibility="hidden";
		document.getElementById('nav02adivider').style.visibility="hidden";
		document.getElementById('nav03adivider').style.visibility="visible";
		document.getElementById('nav03bdivider').style.visibility="visible";
		document.getElementById('nav03cdivider').style.visibility="visible";
		document.getElementById('nav04adivider').style.visibility="hidden";
		document.getElementById('nav04bdivider').style.visibility="hidden";
		
	}
	else if (which=="" && document.getElementById('reddoor')) {  /* off on red door page */
		document.getElementById('nav02a').style.visibility="hidden";
		document.getElementById('nav02b').style.visibility="hidden";
		document.getElementById('nav03a').style.visibility="hidden";
		document.getElementById('nav03b').style.visibility="hidden";
		document.getElementById('nav03c').style.visibility="hidden";
		document.getElementById('nav03d').style.visibility="hidden";
		document.getElementById('nav04a').style.visibility="visible";
		document.getElementById('nav04b').style.visibility="visible";
		document.getElementById('nav04c').style.visibility="visible";
		document.getElementById('nav02adivider').style.visibility="hidden";
		document.getElementById('nav03adivider').style.visibility="hidden";
		document.getElementById('nav03bdivider').style.visibility="hidden";
		document.getElementById('nav03cdivider').style.visibility="hidden";
		document.getElementById('nav04adivider').style.visibility="visible";
		document.getElementById('nav04bdivider').style.visibility="visible"
		
	}
	else {   /* default - all off */
		document.getElementById('nav02a').style.visibility="hidden";
		document.getElementById('nav02b').style.visibility="hidden";
		document.getElementById('nav03a').style.visibility="hidden";
		document.getElementById('nav03b').style.visibility="hidden";
		document.getElementById('nav03c').style.visibility="hidden";
		document.getElementById('nav03d').style.visibility="hidden";
		document.getElementById('nav04a').style.visibility="hidden";
		document.getElementById('nav04b').style.visibility="hidden";
		document.getElementById('nav04c').style.visibility="hidden";
		document.getElementById('nav02adivider').style.visibility="hidden";
		document.getElementById('nav03adivider').style.visibility="hidden";
		document.getElementById('nav03bdivider').style.visibility="hidden";
		document.getElementById('nav03cdivider').style.visibility="hidden";
		document.getElementById('nav04adivider').style.visibility="hidden";
		document.getElementById('nav04bdivider').style.visibility="hidden";
	}

	/* highlight current page */
	if (document.getElementById('history')) {
		document.getElementById('nav02').style.background="url('images/nav02_f2.gif') no-repeat";
	}
	if (document.getElementById('restaurant')) {
		document.getElementById('nav03').style.background="url('images/nav03_f2.gif') no-repeat";
	}
	if (document.getElementById('reddoor')) {
		document.getElementById('nav04').style.background="url('images/nav04_f2.gif') no-repeat";
	}
	
}