function showTrail (id, leftr, topr) {
	document.getElementById("calendar_item_" + id).style.visibility = "visible";
	document.getElementById("calendar_item_" + id).style.left = leftr;
	document.getElementById("calendar_item_" + id).style.top = topr;
}

function leaveTrail (id) {
	document.getElementById("calendar_item_" + id).style.visibility = "hidden";
}

function showTrailHelp () {
	document.getElementById("calendar_item_ajuda").style.visibility = "visible";
	document.getElementById("calendar_item_ajuda").style.left = 209;
	document.getElementById("calendar_item_ajuda").style.top = 316;
}

function leaveTrailHelp () {
	document.getElementById("calendar_item_ajuda").style.visibility = "hidden";
}