function vuelveinicio(){window.location="http://www.elkuru.com";}

	var header_activo = 'header1'; //esta variable guarda cual cabecera se esta mostrando, inicialmente es el header2



	function cambia_texto_presentacion(boton){
	

	
	switch (boton){
	
		case 'header1' :
	
			Effect.Fade(header_activo, { duration: 1.0 });
			Effect.Appear('header1', { duration: 1.0 });
			header_activo='header1';
	
		break;
		
		case 'header2' :
			
			Effect.Fade(header_activo, { duration: 1.0 });
			Effect.Appear('header2', { duration: 1.0 });
			header_activo='header2';
		break;
		
		case 'header3' :
			
			Effect.Fade(header_activo, { duration: 1.0 });
			Effect.Appear('header3', { duration: 1.0 });
			header_activo='header3';
		break;
		
		case 'header4' :
			
			Effect.Fade(header_activo, { duration: 1.0 });
			Effect.Appear('header4', { duration: 1.0 });
			header_activo='header4';
		break;
		
		case 'header5' :
		
			Effect.Fade(header_activo, { duration: 1.0 });
			Effect.Appear('header5', { duration: 1.0 })
			header_activo='header5';
		break;
		
		}
	}