function mark(num, tnum, notecounter) 
{
	var num_name = num;
	var tnum_name = tnum;
	var re = /([^\d]+)/;
	var num_name = num_name.match(re);
	var tnum_name = tnum_name.match(re);

	for (i=1; i<=notecounter; i++)
	{
		document.getElementById(num_name[0] + i).className="TabPassive";
		document.getElementById(tnum_name[0] + i).style.display = "none";
	}

	document.getElementById(tnum_name[0] + 0).innerHTML = "";
	document.getElementById(num).className="TabActive";
	document.getElementById(tnum).style.display = "inline";
}