/**
 * @author kim
 */
function toggle(id) {
	var element = document.getElementById(id);
	if (element.style.display == "block")
		element.style.display = "none";
	else element.style.display = "block";
}
function showmenu(elmnt) {
	document.getElementById(elmnt).style.visibility="visible"
}
function hidemenu(elmnt) {
	document.getElementById(elmnt).style.visibility="hidden"
}