function showNav(navID)
	{
		hideAllNavs();
		document.getElementById(navID).style.display = 'block';
		document.getElementById(navID + '-img').src = 'images/' + navID + '-on.jpeg';
	}
	
	function hideAllNavs()
	{
	   hideNav('nav-contact');
	   hideNav('nav-trips');
	   hideNav('nav-info');
	   hideNav('nav-media');
	   hideNav('nav-whygeco');
	}
  
	function hideNav(navID)
	{
		document.getElementById(navID).style.display = 'none';
		document.getElementById(navID + '-img').src = 'images/' + navID + '-off.jpeg';
	}
	
	function hideSubNav(navID)
	{
		document.getElementById(navID + '-img').src = 'images/' + navID + '-off.jpeg';
	}
  
	function showTripsSubNav(navID)
	{
		document.getElementById(navID + '-img').src = 'images/' + navID + '-on.jpeg';
		if (navID != 'nav-trips-compare')
			hideSubNav('nav-trips-compare');
		if (navID != 'nav-trips-discounts')
			hideSubNav('nav-trips-discounts');
		if (navID != 'nav-trips-popular')
			hideSubNav('nav-trips-popular');
		if (navID != 'nav-trips-latest')
			hideSubNav('nav-trips-latest');
		if (navID != 'nav-trips-custom')
			hideSubNav('nav-trips-custom');
		
	}
	
	function showInfoSubNav(navID)
	{
		document.getElementById(navID + '-img').src = 'images/' + navID + '-on.jpeg';
		if (navID != 'nav-info-costa')
			hideSubNav('nav-info-costa');
		if (navID != 'nav-info-faq')
			hideSubNav('nav-info-faq');
		if (navID != 'nav-info-traveling')
			hideSubNav('nav-info-traveling');
		if (navID != 'nav-info-insurance')
			hideSubNav('nav-info-insurance');
		
	}
	
	function showMediaSubNav(navID)
	{
		document.getElementById(navID + '-img').src = 'images/' + navID + '-on.jpeg';
		if (navID != 'nav-media-image')
			hideSubNav('nav-media-image');
		if (navID != 'nav-media-social')
			hideSubNav('nav-media-social');
		if (navID != 'nav-media-videos')
			hideSubNav('nav-media-videos');
		if (navID != 'nav-media-brochures')
			hideSubNav('nav-media-brochures');
		if (navID != 'nav-media-news')
			hideSubNav('nav-media-news');
		
	}
	
	function showGecoSubNav(navID)
	{
		document.getElementById(navID + '-img').src = 'images/' + navID + '-on.jpeg';
		if (navID != 'nav-geco-whygeco')
			hideSubNav('nav-geco-whygeco');
		if (navID != 'nav-geco-philosophy')
			hideSubNav('nav-geco-philosophy');
		if (navID != 'nav-geco-sustainable')
			hideSubNav('nav-geco-sustainable');
		if (navID != 'nav-geco-carbon')
			hideSubNav('nav-geco-carbon');
		if (navID != 'nav-geco-cultural')
			hideSubNav('nav-geco-cultural');
		
	}