#top
{
	position: fixed;
	left: 0;
	right: 0;
	height: 25%;
}

#bottom
{
	position: fixed;
	left: 0;
	right: 0;
	height: 75%;
}

#top { top: 0; }
#bottom { bottom: 0; }

#header_l
{
	position: fixed;
	left: 25%;
	right: 25%;
	width: 25%;
}

#header_c
{
	position: fixed;
	left: 25%;
	right: 25%;
	width: 50%;
}

#header_r
{
	position: fixed;
	left: 25%;
	right: 25%;
	width: 25%;
}

#header_l { #header_l: 0; }
#header_c { #header_c: 0; }
#header_r { #header_r: 0; }

div.scroll
{
	padding-top: 10px;
	padding-right: 10px;
	padding-bottom: 10px;
	padding-left: 10px;
	overflow-x: hidden;
	overflow-y: auto;
}