function changeFirstChar(druh) {
	var currentTime = new Date();
	currentTime.setSeconds(604800 + currentTime.getSeconds());
	switch(druh) {
		case "a": {
			document.getElementById("firstchar").className = "alba";
			document.cookie = "CDs[50]=alba; expires=" + currentTime.toGMTString() + "; ";
			break;
		}
		case "t": {
			document.getElementById("firstchar").className = "texty";
			document.cookie = "CDs[50]=texty; expires=" + currentTime.toGMTString() + "; ";
			break;
		}
		case "o": {
			document.getElementById("firstchar").className = "onlines";
			document.cookie = "CDs[50]=onlines; expires=" + currentTime.toGMTString() + "; ";
			break;
		}
		default: {
			document.getElementById("firstchar").className = "skupiny";
			document.cookie = "CDs[50]=skupiny; expires=" + currentTime.toGMTString() + "; ";
			break;
		}
	}
}