ola graisas por responder mira aki esta el kodigo
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>my-estylo.com</title>
<link rel="stylesheet" href="estilo_plantilla.css" type="text/css" media="all">
</head>
<body>
<div id="global">
<div id="curva-superior"></div>
<div id="cabecera">
<div id="logotipo"><a href="index.html"><img src="objetos/logo1.png" width="113" height="99"
alt="Haz clic aquí para volver a la página de inicio"></a></div>
<div id="publicidad">my-estylo-com</div>
</div>
<div id="navegacion">
<ul>
<li><a href="#">INICIO</a></li><li><a href="#">NUESTRA EMPRESA</a></li><li><a href="#">PRODUCTOS</a></li><li><a href="#">REGISTRARME</a></li><li><a href="#">MAS</a></li>
</ul>
</div>
<div id="contenido">
<h1>Inicio</h1>
<div id="izquierda"> <p>ezquierda</p></div>
<div id="centro"> <p>centro; parafo
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<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
hahahahaahhahaahahahahhahahahahaaaaahhhhhhhhhhhhhhhhhhhhhh</p>
<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
hahahahaahhahaahahahahhahahahahaaaaahhhhhhhhhhhhhhhhhhhhhh</p>
<p>hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh </p>
</div>
<div id="derecha"><p>derecha</p></div>
</div>
<div id="pie">© todos los derechos reservados my-estylo.com</div>
<div id="curva-inferior"></div>
</div>
</body>
</html>
@charset "utf-8";
/* CSS Document */
* {text-indent:0px; margin:0px; padding:0px; border:0px;}
p {text-align:justify}
h1 {font-size:1.2em; color:white; font-weight:bold; text-decoration:none;
text-align:center;}
h2 {font.size:1.1em; color:blue; font-weight:bold; text-decoration:none;
text-align:center;}
body {text-align:center;}
#global {width:800px; margin:4px auto;}
#curva-superior {background-image:url(objetos/curva-superior.gif);
background-repeat:no-repeat;
width:800px;
height:12px;
overflow:hidden;}
#cabecera {background-color:#A05; border-left:black 1px solid;
border-right:black 1px solid; height:99px;}
#logotipo {width:220px; float:left;}
#logotipo a {}
#logotipo a:link {}
#logotipo a:visited {}
#logotipo a:hover {background-color:#F05}
#logotipo a:link {}
#logotipo a:visited {}
#publicidad {width:578px; float:right; margin-top:25px; font-size:32px;color:white}
#navegacion {background-color:black; border:black 1px solid; height:20px;font-weight:bold;color:white}
#navegacion li {float:left; list-style:none; margin:0px 20px 0px 20px;}
#navegacion ul {margin-left:70px}
#contenido {background-color:#F05; border-left:black 1px solid;border-right:black 1px solid;height:800px;}
#contenido p {margin:0px 10px 0px 10px; text-indent:15px;}
#izquierda {height: 780px ;background-color:blue; float:left; width:150px;border-right: black 1px solid;}
#centro {height: 780px ;background-color:green; float:left; width:498px;}
#derecha {height: 780px ;background-color:yellow; float:left; width:150px;border-left: black 1px solid;}
#pie {border-left:black 1px solid; border-right:black 1px solid;border-top:black 1px solid; height:20px;background-color:black;color:white;}
#curva-inferior {background-image:url(objetos/curva-inferior.gif);
background-repeat:no-repeat;width:800px;height:12px;overflow:hidden;}
a {color:white; text-decoration:none; display:block;}
a:link {}
a:visited {}
a:hover {color:#F05; text-decoration:underline; background-color:black;}
a:active {}
ojala me puedas ayudar!!!