body{
 background-image: url(../publicidad/linea.jpg);
 background-attachment: fixed;
}
#contenedor{	
	width: 1010px; margin: 0 auto;
}
#contenedor_superior{
	width: 1010px;
	height: 20px;
	background-image: url(../imagenes/Photoshop/contenedor_sup.gif);
}
#contenedor_centro{
	width: 1010px;
	background-image: url(../imagenes/Photoshop/contenedor_centro.gif);
}
#contenedor_inferior{
	width: 1010px;
	height: 20px;
	background-image: url(../imagenes/Photoshop/contenedor_inf.gif);
}
#cabecera_superior{
	width: 980px;
	background-color: black;	
	margin-left: 18px;
}
#cabecera_menu{
	width: 980px;
	height: 200px;
	background-image: url(../imagenes/encabezado.jpg);
	margin-left: 16px;
}

#base{
    width: 980px; 
	 background-color: yellow;
	 margin-left: 15px;
	 overflow: hidden;		
}
#cuerpo{
	 
}
#arriba{
	width: 100%;
	height: 100px;
	background-color: black;
} 
#izquierda{
    width: 180px;
    background-color:yellow;
    float:left;
	 text-align: center;
	
}
#derecha{
    width: 180px;
    float: right;
	 background-color: yellow;	
	 text-align: center;
}  
#principal{
    margin-left: 185px;
    background-color:#4682b4;
    padding: 4 4 4 4px;
    width: 608px;
	 border-left: 2px solid black;
	 border-bottom: 2px solid black;
	 border-right: 2px solid black;
} 
#principal_2{
    margin-left: 185px;
    background-color: #4682b4;
    padding: 4 4 4 4px;
    width: 815px;
	 height: auto;
	 border-left: 2px solid black;
	 border-bottom: 2px solid black;
}