function blogheadlinesTabs(i) {
	document.getElementById("headlines").style.display = (i == "on-headlines") ? "block" : "none";
	document.getElementById("videos").style.display = (i == "on-videos") ? "block" : "none";
	document.getElementById("features").style.display = (i == "on-features") ? "block" : "none";
	document.getElementById("about-cs").style.display = (i == "on-about-cs") ? "block" : "none";
	
	document.getElementById("blogheadlines-tab").className = i;
}