function tier_department_choice(section)
{
	switch(section)
	{
		case '1':
		{
			document.getElementById('navdd_button_saltwater').className = 'buttons_selected';
			document.getElementById('navdd_button_freshwater').className = 'buttons';
			document.getElementById('navdd_button_herpetology').className = 'buttons';
			
			document.getElementById('navdd_content_saltwater').style.display = 'block';
			document.getElementById('navdd_content_freshwater').style.display = 'none';
			document.getElementById('navdd_content_herpetology').style.display = 'none';
			break;
		}
		case '2':
		{
			document.getElementById('navdd_button_saltwater').className = 'buttons';
			document.getElementById('navdd_button_freshwater').className = 'buttons_selected';
			document.getElementById('navdd_button_herpetology').className = 'buttons';
			
			document.getElementById('navdd_content_saltwater').style.display = 'none';
			document.getElementById('navdd_content_freshwater').style.display = 'block';
			document.getElementById('navdd_content_herpetology').style.display = 'none';
			break;
		}
		case '3':
		{
			document.getElementById('navdd_button_saltwater').className = 'buttons';
			document.getElementById('navdd_button_freshwater').className = 'buttons';
			document.getElementById('navdd_button_herpetology').className = 'buttons_selected';
			
			document.getElementById('navdd_content_saltwater').style.display = 'none';
			document.getElementById('navdd_content_freshwater').style.display = 'none';
			document.getElementById('navdd_content_herpetology').style.display = 'block';
			break;
		}
	}
}
function tier_department_type_choice(department, section)
{
	switch(section)
	{
		case '1':
		{
			document.getElementById('navdd_button_' + department + '_systems').className = 'buttons_selected';
			document.getElementById('navdd_button_' + department + '_modules').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_probes').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_accessories').className = 'buttons';
			
			document.getElementById('navdd_content_' + department + '_systems').style.display = 'block';
			document.getElementById('navdd_content_' + department + '_modules').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_probes').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_accessories').style.display = 'none';
			break;
		}
		case '2':
		{
			document.getElementById('navdd_button_' + department + '_systems').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_modules').className = 'buttons_selected';
			document.getElementById('navdd_button_' + department + '_probes').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_accessories').className = 'buttons';
			
			document.getElementById('navdd_content_' + department + '_systems').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_modules').style.display = 'block';
			document.getElementById('navdd_content_' + department + '_probes').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_accessories').style.display = 'none';
			break;
		}
		case '3':
		{
			document.getElementById('navdd_button_' + department + '_systems').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_modules').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_probes').className = 'buttons_selected';
			document.getElementById('navdd_button_' + department + '_accessories').className = 'buttons';
			
			document.getElementById('navdd_content_' + department + '_systems').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_modules').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_probes').style.display = 'block';
			document.getElementById('navdd_content_' + department + '_accessories').style.display = 'none';
			break;
		}
		case '4':
		{
			document.getElementById('navdd_button_' + department + '_systems').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_modules').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_probes').className = 'buttons';
			document.getElementById('navdd_button_' + department + '_accessories').className = 'buttons_selected';
			
			document.getElementById('navdd_content_' + department + '_systems').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_modules').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_probes').style.display = 'none';
			document.getElementById('navdd_content_' + department + '_accessories').style.display = 'block';
			break;
		}
	}
}