How come I can not see my Navigation in Dreamweaver unless I use live view.

Code:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"  "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<link rel="stylesheet" href="css/style.css" type="text/css" /><style>._css3m{display:none}</style>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Accessible Destinations - Home</title>
<meta name="description" content=" ">

</head>

<body>

<!-- Start of banner and menu -->


      <div id="banner" style="text-align: center;"><img src="images/banner3.jpg"  alt=""></div>
<br>  

<div align="center">

<ul id="css3menu1" class="topmenu">
	<li class="topfirst"><a href="index.html" style="height:16px;line-height:16px;width:90px;">HOME</a></li>
	<li class="topmenu"><a href="#" style="height:16px;line-height:16px;width:90px;">ABOUT US</a></li>
	<li class="topmenu"><a href="#" style="height:16px;line-height:16px;width:90px;"><span>DESTINATION</span></a>
	<ul>
		<li><a href="tropical.html" style="height:16px;line-height:16px;width:90px;">TROPICAL</a></li>
		
	</ul></li>
	<li class="topmenu"><a href="blog.html" style="height:16px;line-height:16px;width:90px;">COMMENTS</a></li>
	<li class="toplast"><a href="#" style="height:16px;line-height:16px;width:90px;">CONTACT</a></li>
</ul>

<br>

<!-- End of banner and menu -->
	
<hr style="width: 784px;"> 


<!-- Start of footer -->

<div id="footer">
<h6>Website designed by <a  href="http://www.cjwebconsulting.com" target="_blank">CJ Web  Consulting</a></h6>
</div>
         
<!-- End of footer -->


</body>
</html>