var ArrayCajas = new Array (null,1,1,0,0,0,0,0); //Estado de las capas: 1-> visible; 0 -> oculta;
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/* Precarga de imagenes */
/* ······································································ */
// Flechas y texto del párafo princiapl
Flecha1Out = new Image();
Flecha1Out.src = "gifs/c116.gif";
Flecha1Over = new Image();
Flecha1Over.src = "gifs/c117.gif";
Flecha1Down = new Image();
Flecha1Down.src = "gifs/c118.gif";
Flecha2Out = new Image();
Flecha2Out.src = "gifs/c119.gif";
Flecha2Over = new Image();
Flecha2Over.src = "gifs/c120.gif";
Flecha2Down = new Image();
Flecha2Down.src = "gifs/c121.gif";
Flecha3Out = new Image();
Flecha3Out.src = "gifs/c122_cast.gif";
Flecha3Over = new Image();
Flecha3Over.src = "gifs/c123_cast.gif";
Flecha4Out = new Image();
Flecha4Out.src = "gifs/c124_cast.gif";
Flecha4Over = new Image();
Flecha4Over.src = "gifs/c125_cast.gif";
// Cajas de texto para la capa Caja7
CajaTexto0 = new Image();
CajaTexto0.src = "gifs/c112.gif";
CajaTexto1 = new Image();
CajaTexto1.src = "gifs/c107_cast.gif";
CajaTexto2 = new Image();
CajaTexto2.src = "gifs/c108_cast.gif";
CajaTexto3 = new Image();
CajaTexto3.src = "gifs/c109_cast.gif";
CajaTexto4 = new Image();
CajaTexto4.src = "gifs/c110_cast.gif";
// Cajas de texto e imágenes para la capa Caja3
Caja3_1 = new Image();
Caja3_1.src = "gifs/c087_cast.gif";
Caja3_2 = new Image();
Caja3_2.src = "gifs/c088_cast.gif";
Caja3_3 = new Image();
Caja3_3.src = "gifs/c182.gif";
Caja3_4 = new Image();
Caja3_4.src = "gifs/c183.gif";
Caja3_5 = new Image();
Caja3_5.src = "gifs/c184.gif";
Caja3_6 = new Image();
Caja3_6.src = "gifs/c185.gif";
/* ······································································ */
/* Mostrar la caja común + la seleccionada */
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function MostrarCapa(cual){
  self.focus();
  OcultarTodas(cual);
}
function OcultarTodas(cual){
  if(ie){
	for(i=4;i<=7;i++){
	 EstaCaja = eval("document.all.Caja"+i);
	 EstaCaja.style.visibility ="hidden";
	 ArrayCajas[i] = 0;
	}
  }else{
	for(i=4;i<=7;i++){
	 EstaCaja = eval("document.layers['Caja"+i+"']");
	 EstaCaja.visibility ="hide";
	 ArrayCajas[i] = 0;
	}
  }
  MostrarEsta(cual);
}
function MostrarEsta(cual){
  if(ie){
	EstaCaja = eval("document.all.Caja"+cual);
	document.all.Caja3.style.visibility ="visible";
	EstaCaja.style.visibility ="visible";
  }else{
	EstaCaja = eval("document.layers['Caja"+cual+"']");
	document.layers['Caja3'].visibility ="show";
	EstaCaja.visibility ="show";
  }
  
  if(cual==4){
	Activa('Caja2','Caja3_1_Name','Caja3_3');
	Activa('Caja2','Caja3_2_Name','Caja3_1');	  
	Activa('Caja2','Caja3_3_Name','Caja3_2');	
  }else if(cual==5){
	Activa('Caja2','Caja3_1_Name','Caja3_4');
	Activa('Caja2','Caja3_2_Name','Caja3_6');	  
	Activa('Caja2','Caja3_3_Name','Caja3_5');	
  }else{
	DesActiva('Caja2','Caja3_1_Name','Caja3_3');
	DesActiva('Caja2','Caja3_2_Name','Caja3_1');
	DesActiva('Caja2','Caja3_3_Name','Caja3_2');	  
  }
  
  ArrayCajas[cual] = 1;
}
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/* Cambios de imagenes */
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function Activa(Activa1, Activa2, Activa3){
  EsteSource = eval(Activa3+".src")
  if(ie){
	document[Activa2].src = EsteSource;
  }else{
	EstaCapa = eval("document.layers['"+Activa1+"'].document.images['"+Activa2+"']");
	EstaCapa.src = EsteSource;
  }
}
function DesActiva(Activa1, Activa2, Activa3){
  EsteSource = eval(Activa3+".src")
  if(ie){
	document[Activa2].src = EsteSource;
  }else{
    EstaCapa = eval("document.layers['"+Activa1+"'].document.images['"+Activa2+"']");
	EstaCapa.src = EsteSource;
  }
}