function nav_ToggleSection(section_id) {
	if ($('nav_section_'+section_id+'_pages').style.display == 'none') {
		$('nav_section_'+section_id+'_arrow').src = 'images/nav/arrows/up_white_solid.gif';
	} else {
		$('nav_section_'+section_id+'_arrow').src = 'images/nav/arrows/down_white_solid.gif';
	}
	
	Element.toggle('nav_section_'+section_id+'_pages');
}

function nav_MouseOverSection(section_id, background_number) {
	$('nav_section_'+section_id).style.backgroundImage = "url('images/nav/rollover/nav" + background_number + "_ro.gif')";
	$('nav_section_'+section_id).style.color = "white";
	
	if ($('nav_section_'+section_id+'_arrow')) {
		img_src = $('nav_section_'+section_id+'_arrow').src.substr($('nav_section_'+section_id+'_arrow').src.lastIndexOf('/')+1);
		if (img_src == 'down_black.gif') {
			$('nav_section_'+section_id+'_arrow').src = 'images/nav/arrows/down_white_solid.gif';
		} else if (img_src == 'up_black.gif') {
			$('nav_section_'+section_id+'_arrow').src = 'images/nav/arrows/up_white_solid.gif';
		}
	}
}

function nav_MouseOutSection(section_id, background_number) {
	$('nav_section_'+section_id).style.backgroundImage = "url('images/nav/default/nav" + background_number + ".gif')";
	$('nav_section_'+section_id).style.color = "black";

	if ($('nav_section_'+section_id+'_arrow')) {
		img_src = $('nav_section_'+section_id+'_arrow').src.substr($('nav_section_'+section_id+'_arrow').src.lastIndexOf('/')+1);
		if (img_src == 'down_white_solid.gif') {
			$('nav_section_'+section_id+'_arrow').src = 'images/nav/arrows/down_black.gif';
		} else if (img_src == 'up_white_solid.gif') {
			$('nav_section_'+section_id+'_arrow').src = 'images/nav/arrows/up_black.gif';
		}
	}
}

function nav_MouseOverPage(page_id) {
	$('nav_subpage_'+page_id).style.backgroundImage = "url('images/nav/subnav_ro.gif')";
	$('nav_subpage_'+page_id).style.color = "white";
}

function nav_MouseOutPage(page_id) {
	$('nav_subpage_'+page_id).style.backgroundImage = "";
	$('nav_subpage_'+page_id).style.color = "black";
}