<head>
<style type="text/css"media="all">
#tudo{
width:900px;
height:600px;
float:center;
background:#bbb;
}
#topo{
width:900px;
height:70px;
float:left;
margin:0 auto;
background:#dfc;
}
#menu_sup{
width:900px;
height:20px;
float:left;
margin:0 auto;
background:#ccc;
}
#col_dir{
width:225px;
height:450px;
float:left;
margin:0 auto;
background:#006400;
}
#col_esq{
width:225px;
height:450px;
float:right;
margin:0 auto;
background:#006400;
}
#cont_princ{
width:430px;
height:450px;
float:left;
margin:8px;
background:#cce;
}
#rodape{
width:900px;
height:90px;
margin:0 auto;
float:left;
background:#cce;
</style>
</head>
<body>
<div id="tudo">
<div id="topo"> </div>
<div id="menu_sup"> </div>
<div id="col_dir"> </div>
<div id="col_esq"> </div>
<div id="cont_princ"> </div>
<div id="rodape"> </div>
</div>
</body>
</html>
