html, body {
	margin:0;
	padding:0;
}
body{
	text-align:center;	/*para IE*/
}
#contenedor{
	width:800px;
	margin:auto;		/*para FF*/
	text-align:left;	/*para IE*/
	display:table;
}

/*#contenedor{
	position:absolute;
	margin:0 0 0 -435px;
	left:50%;
	top:0;
}*/

#cabecera{
	float:left;
	width:100%;
}
	#cabecera p{
		margin:0;
		padding:0;
	}
	#cabecera img{
		max-width:800px;
		width: expression(this.clientWidth > 800 ? "800px":"inherit")!important;
	}
#pie{
	float:left;
	width:100%;
	margin:10px 0 0 0;
	display:inline;
}
	#pie img{
		max-width:800px;
		width: expression(this.clientWidth > 800 ? "800px":"inherit")!important;
	}

#desarrollo{
	float:left;
	width:100%;
}
	#menu{
		float:left;
		width:780px;
		margin:10px;
		display:inline;
	}
	#contenido{
		float:left;
		width:770px;
		margin:15px;
		display:inline;
		min-height:300px;
		* height:300px;
	}