I want to insert navigation bar on top of my current header. How do I do it?

This is the beginning of the code that includes the header.

Code:
body {
	background-color: grey;
	
        background-image: url("../images/logo.jpg");
        background-position: 0% 0%;
	margin: 0;
}

h1, h2, h3 {
	margin: 0;
}


.page, header, footer, .sidebar > div, nav {
	-webkit-box-shadow: 3px 3px 5px 0 rgba(0, 0, 0, 0.5);
	box-shadow: 3px 3px 5px 0 rgba(0, 0, 0, 0.5);
}


.page {
	background-color: #FFFFDB;
	margin: 28px auto;
	padding: 8px;
	width: 1000px;
}

header {
	background-color:#BABD98;
	border: 10px solid #BABD98;
	text-align: center;
	margin-bottom: 18px;
}

Thank you very much

qim