function changeTab(newActive) {
	var newsTab = document.getElementById('news_tab');
	var calendarTab = document.getElementById('calendar_tab');
	
	var newsTabDiv = document.getElementById('newsTabDiv');
	var calendarTabDiv = document.getElementById('calendarTabDiv');
	
	if (newActive == 'news') {
		newsTab.className = 'tabactive';
		calendarTab.className = 'tabinactive';
		newsTabDiv.style.display = 'block';
		calendarTabDiv.style.display = 'none';
	}
	if (newActive == 'calendar') {
		newsTab.className = 'tabinactive';
		calendarTab.className = 'tabactive';
		newsTabDiv.style.display = 'none';
		calendarTabDiv.style.display = 'block';
	}
}