:root{
	--showHist: none;
}
#showHist:checked ~ *{
	--showHist: inline;
}
body {
	background-image:url(top_bg.jpg);
	background-repeat: repeat-x;
}
a {
	font-size: 9pt;
	color:navy;
}
table a {
	font-size: 11pt;
}
a:hover {
	color:red;
}
label {
	display:block;
	width:140px;
	float:left;
}
del{
	color: red;
	text-decoration: line-through;
	display: var(--showHist);
}
ins{
	color: blue;
	text-decoration: none;
}
.periodDelete{
	color:red;
}