function checkTopic() {
	var c = document.cookie.match ('topicCookie=(.*?)(;|$)');
	if(c) {
		var cTab=c[1];
		var sets = 3;
		for(b = 1; b < (sets + 1); b ++) {
			document.getElementById('topic_' + b).style.display = "none";
			document.getElementById('tLink_' + b).style.color = "#000000";
		}
		document.getElementById('topic_' + cTab).style.display = "block";
		document.getElementById('tLink_' + cTab).style.color = "#ffffff";
	}
}

function actionTopic(a){
	var sets = 1;
	for(b = 1; b < (sets + 1); b ++) {
		document.getElementById('topic_' + b).style.display = "none";
		document.getElementById('tLink_' + b).style.color = "#000000";
	}
	document.getElementById('topic_' + a).style.display = "block";
	document.getElementById('tLink_' + a).style.color = "#ffffff";
	document.cookie = "topicCookie=" + a;
}