var faq = {
	
	currentHighlight: null,
	
	// highlight selected FAQ
	highlight: function(id) {
		
		// set hightlight
		var question = document.getElementById(id);
		question.className = "highlight";
		
		// remove highlight
		if (this.currentHighlight !== null && this.currentHighlight !== id) {
			this.removeHighlight(this.currentHighlight);
		}
		
		this.currentHighlight = id;
	},
	
	removeHighlight: function(id) {
		var highlightElem = document.getElementById(id);
		highlightElem.className = "";
	}
};