body {
margin: 0;
padding: 0;
background-color: #FFF; /* optional */
}
#content {
width: 100%;
height: 100% -50px;
margin: 0;
padding: 0;
background-image:url('images/content.png');
background-repeat:repeat-y;
background-position:top; 
position:relative;
z-index:1;
}
#contentend {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
background-image:url('images/content_bottom.png');
background-repeat:no-repeat;
background-position:bottom;
}
#footer {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
background-image:url('images/footer.png');
background-repeat:no-repeat;
background-position:top;
}
#wraptop {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
background-image:url('images/bg_top.jpg');
background-repeat:no-repeat;
background-position:top; 
}
#wrapmid {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
background-image:url('images/bg_mid.jpg');
background-repeat:repeat-y;
background-position:center; 
}
#wrapbot {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
background-image:url('images/bg_bottom.jpg');
background-repeat:no-repeat;
background-position:bottom; 
}
#logo {
       position:     absolute;
       top:          0px;
       left:         50%;
       width:        800px;
       margin-left:  -400px;
}

body {
	background-color: #000000;
}
<!--start menu css-->
menuChunk {
	font-size: 14px;
	font-family: Arial, Helvetica, sans-serif; 
	font-weight: bold;
	margin: 0;
	padding: 0;
}
.container {width: 926px; margin: 0 auto;}



ul#topnav {
	margin: 0; padding: 0;
	float: left;
	width: 925px;
	list-style: none;
	position: relative;
	font-size: 15px;
	top:1px;
	background: url(images/topnav.gif) repeat-x;
}
ul#topnav li {
	float: left;
	margin: 0; padding: 0;
	border-right: 1px solid #FFF;
}
ul#topnav li a {
	padding: 8px 15px;
	display: block;
	color: #f0f0f0;
	text-decoration: none;
}
ul#topnav li:hover { background: url(topnav-hl.gif) repeat-x; }
ul#topnav li span {
	float: left;
	padding: 3px 0;
	position: absolute;
	left: 0; top:32px;
	display: none;
	width: 925px;
	background: url(images/BTnav.gif) repeat-x;
	color: #fff;
	-moz-border-radius-bottomright: 10px;
	-khtml-border-radius-bottomright: 10px;
	-webkit-border-bottom-right-radius: 10px;
	-moz-border-radius-bottomleft: 10px;
	-khtml-border-radius-bottomleft: 10px;
	-webkit-border-bottom-left-radius: 10px;
}
ul#topnav li:hover span { display: block; }
ul#topnav li span a { display: inline; }
ul#topnav li span a:hover {text-decoration: underline;}
<!--end menu css-->