function AddOn(id) {

	if (document.getElementById(id).style.display == "block") {

		document.getElementById(id).style.display = "none";
		document.getElementById(id + "arrowdown").style.display = "inline";
		document.getElementById(id + "arrowdowna").focus();
		document.getElementById(id + "arrowup").style.display = "none";

	} else {

		document.getElementById(id).style.display = "block";
		document.getElementById(id + "arrowup").style.display = "inline";
		document.getElementById(id + "arrowupa").focus();
		document.getElementById(id + "arrowdown").style.display = "none";

	}

}