body{
	margin: 0 auto;
	text-align: center;
	font-family:Tahoma, Arial;
	font-size:11px;
	background-image:url(files_index/bg_principal.jpg);
	color:#584F2C;
}

#principal{
	text-align:left;
	width:777px;
	height:auto;
	margin:0 auto;	
}

#cabecalho{
	width:777px;
	height:335px;
}

#conteudo{
	width:777px;
	height:auto;
	background-image:url(files_index/bgver.jpg);
}

#conteudo_lado_esquerdo{
	width:212px;
	height:auto;
	position:relative;
	float:left;
	background-image:url(files_index/bg_lado_esquerdo.jpg);
	background-repeat:no-repeat;
}

#conteudo_lado_direito_elementos{
	width:500px;
	height:100%;
	position:relative;
	padding-left:15px;
	padding-right:45px;
	padding-bottom:15px;
}

#conteudo_lado_direito{
	width:564px;
	height:auto;
	position:relative;
	float:right;
	background-image:url(files_index/background_direito.jpg);
}


#rodape{
	width:777px;
	height:79px;
	position:relative;
}
<!-- formulario -->
#formulario_lado_esquerdo{
	width:300px;
	height:300px;
	padding-left:10px;
	float:left;
	position:relative;
}

#formulario_lado_direito{
	padding-left:10px;
	width:182px;
	float:left;
	height:300px;
	float:left;
	position:relative;
}
.caixa {
	padding: 2px;
	border-width:thick;
	border-style:none;
	border-color:#000000;
	
	border:1px solid #EEEEEE;
	font-family:Tahoma, Arial;
	font-size:11px;
	color: #A8A8A8;
	font-weight:normal;
	_height: 12px;
	width: 240px;
}

.caixa_mensagem {
	padding: 2px;
	border-width:thick;
	border-style:none;
	border-color:#000000;
	
	border:1px solid #EEEEEE;
	font-family:Tahoma, Arial;
	font-size:11px;
	color: #A8A8A8;
	font-weight:normal;
	_height: 70px;
	width: 240px;
}

.caixaboa {
	font-family:Tahoma, Arial;
	font-size:11px;
	color: #990000;
}

link {
	font-family:Tahoma, Arial;
	font-size:11px;
	color:#666666;
	}

a:link, a:visited, a:active{
	font-family:Tahoma, Arial;
	font-size:11px;
	color: #969696;
	text-decoration:none;
}

a:hover{
	font-family:Tahoma, Arial;
	font-size:11px;
	color: #990000;
	text-decoration:none;
}