function hideShowNavigation(action, value){
	if(action == 'show'){
		document.getElementById('subNavManagement').style.display = 'none';
		document.getElementById('subNavApartments').style.display = 'none';
		document.getElementById('subNavBrokerage').style.display = 'none';
		document.getElementById('subNavDevelopment').style.display = 'none';
		document.getElementById('subNavAbout').style.display = 'none';
		//document.getElementById('subNavContact').style.display = 'none';
		
		if(value != 'Contact'){
			document.getElementById('subNav'+value).style.display = 'block';
		}
	}
}