var day_array = Array();

function close_elem(id) {
	var infotext = "evtinfotext"+id;
	var link = "evtlink"+id;
	var extrainfo = "evtextrainfo"+id;
	document.getElementById(infotext).style.display = "none";
	document.getElementById(extrainfo).style.display = "none";
	document.getElementById(link).firstChild.data = "+ Aufgabenstellung und Lösung zeigen";
}

function open_elem(id) {
	var infotext = "evtinfotext"+id;
	var link = "evtlink"+id;
	var extrainfo = "evtextrainfo"+id;
	document.getElementById(infotext).style.display = "inline";
	document.getElementById(extrainfo).style.display = "inline";
	document.getElementById(link).firstChild.data = "- Aufgabenstellung und Lösung schließen";
}

function vis_elem(elem) {
	var infotext = "evtinfotext"+elem;
	var link = "evtlink"+elem;
	var extrainfo = "evtextrainfo"+elem;
	if (document.getElementById("evtinfotext"+elem).style.display == "none") {
		open_elem(elem);
	} else {
		close_elem(elem);
	}
}