function headlinesTabs(i) {
	document.getElementById("more-headlines").style.display = (i == "on-more-headlines") ? "block" : "none";
	document.getElementById("calendar").style.display = (i == "on-calendar") ? "block" : "none";
	document.getElementById("results").style.display = (i == "on-results") ? "block" : "none";
	document.getElementById("features").style.display = (i == "on-features") ? "block" : "none";
	
	document.getElementById("headlines-tab").className = i;
}