.head_decor
{
	background-image: url(tlo.jpg);
	background-size: 100% 100%;
	margin-bottom: 0px;
	height: 400px;

}

.nb
{
	 border-style: double hidden double hidden;
	 border-color: black;
	 border-width: 4px;
}

.nb_active
{
	background-color: #e0f0d0;
	color: #0000ff;
}