body {
	background-image: url(Images/cmbg.gif);
}
#maindiv {
    position:absolute; 
	z-index:1; 
	left: 0; 
	top: 0;
}
.leftnav {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 11px;
	color: #FFFFFF;
}
.leftmain {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 12px;
	color: #FFFFFF;
	width: 765px;
}
.leftmain p {
text-align: left;
padding: 0 15px;
}

.rightmain {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 11px;
	color: #FFFFFF;
	background-position: center top;
	padding: 0 0 0 15px;
}
.mainbody {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 12px;
	color: #000000;
	padding: 6px;
}
h1 {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 24px;
	font-weight: bold;
	color: #ffffff;
}
.listhead {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 18px;
	font-weight: bold;
	color: #ffffff;
}
a {
	font-family: Arial, Helvetica, sans-serif;
	font-size: 12px;
	color: #CCCCCC;
}
.label {
    font-family: Arial, Helvetica, sans-serif;
	font-size: 12px;
	color: #ffffff;
}
.labelhead {
    font-family: Arial, Helvetica, sans-serif;
	font-size: 12px;
	color: #ffffff;
	font-weight: bold;
}
<link href="test.css" rel="stylesheet" type="text/css">