html {
	max-width: 768px;
	min-width: 768px;
	margin: 0 auto;
}
body {
	font-family: Tahoma;
}
div.show {
	visibility: visible;
}
div.hide {
	visibility: hidden;
}
table.tab {
	border-collapse: separate;
	border-spacing: 0px;
	text-align: left;
}
th.tab {
	text-align: center;
	border-bottom-color: black;
	border-bottom-style: solid;
	border-bottom-width: 2px;
	font-style: italic;
	background-color: orange;
}
td.tab {
	background-color: lightgreen;
}
.form {
	border: 1px solid;
}