function addClassToElement (ele, cls) {
	
	ele.className += " " + cls;
}

function flagError (elementId) {
	
	ele = document.getElementById(elementId);
	
	if (ele != null) {
		
		addClassToElement(ele, "error");
	}
}

function setActiveNewsItem (newsItemId) {
	
	for (var i = 1; i <= 3; i++) {
		
		document.getElementById("newsItem-" + i + "-caption").className = "";
		document.getElementById("newsItem-" + i + "-img").className = "";
	}
	
	addClassToElement(document.getElementById("newsItem-" + newsItemId + "-caption"), "active");
	addClassToElement(document.getElementById("newsItem-" + newsItemId + "-img"), "active");
}

function setSelected (elementId) {
	
	ele = document.getElementById(elementId);
	
	if (ele != null) {
		
		addClassToElement(ele, "selected");
	}
}