// Precarga de imágenes
  var C1 = new Image();
  var C2 = new Image();
  var C3 = new Image();
  var C4 = new Image();
  var C5 = new Image();
  var C1On = new Image();
  var C2On = new Image();
  var C3On = new Image();
  var C4On = new Image();
  var C5On = new Image();
  
  C1.src = "Img/bt_Contenido.jpg";
  C2.src = "Img/bt_Caracteristicas.jpg";
  C3.src = "Img/bt_Niveles.jpg";
  C4.src = "Img/bt_Fotos.jpg";
  C5.src = "Img/bt_Videos.jpg";
  C1On.src = "Img/bt_ContenidoPul.jpg";
  C2On.src = "Img/bt_CaracteristicasPul.jpg";
  C3On.src = "Img/bt_NivelesPul.jpg";
  C4On.src = "Img/bt_FotosPul.jpg";
  C5On.src = "Img/bt_VideosPul.jpg";

//Funciones de carga de imágenes
function ContenidoClick()
{
	document.images['contenido'].src=C1On.src;
	document.images['caracteristicas'].src=C2.src;
	document.images['niveles'].src=C3.src;
	document.images['fotos'].src=C4.src;
	document.images['videos'].src=C5.src;
	document.getElementById("ContenedorCursos").style.background = "url(Img/FondoCursos.jpg)";
	document.getElementById("CursosContenido").style.display = "block";
	document.getElementById("CursosCaracteristicas").style.display = "none";
	document.getElementById("CursosNiveles").style.display = "none";
	document.getElementById("CursosFotos").style.display = "none";
	document.getElementById("CursosVideos").style.display = "none";
}
function CaracteristicasClick()
{
	document.images['contenido'].src=C1.src;
	document.images['caracteristicas'].src=C2On.src;
	document.images['niveles'].src=C3.src;
	document.images['fotos'].src=C4.src;
	document.images['videos'].src=C5.src;
	document.getElementById("ContenedorCursos").style.background = "url(Img/FondoCursos2.jpg)";
	document.getElementById("CursosContenido").style.display = "none";
	document.getElementById("CursosCaracteristicas").style.display = "block";
	document.getElementById("CursosNiveles").style.display = "none";
	document.getElementById("CursosFotos").style.display = "none";
	document.getElementById("CursosVideos").style.display = "none";
}
function NivelesClick()
{
	document.images['contenido'].src=C1.src;
	document.images['caracteristicas'].src=C2.src;
	document.images['niveles'].src=C3On.src;
	document.images['fotos'].src=C4.src;
	document.images['videos'].src=C5.src;
	document.getElementById("CursosContenido").style.display = "none";
	document.getElementById("CursosCaracteristicas").style.display = "none";
	document.getElementById("CursosNiveles").style.display = "block";
	document.getElementById("CursosFotos").style.display = "none";
	document.getElementById("CursosVideos").style.display = "none";
}
function FotosClick()
{
	document.images['contenido'].src=C1.src;
	document.images['caracteristicas'].src=C2.src;
	document.images['niveles'].src=C3.src;
	document.images['fotos'].src=C4On.src;
	document.images['videos'].src=C5.src;
	document.getElementById("CursosContenido").style.display = "none";
	document.getElementById("CursosCaracteristicas").style.display = "none";
	document.getElementById("CursosNiveles").style.display = "none";
	document.getElementById("CursosFotos").style.display = "block";
	document.getElementById("CursosVideos").style.display = "none";
}
function VideosClick()
{
	document.images['contenido'].src=C1.src;
	document.images['caracteristicas'].src=C2.src;
	document.images['niveles'].src=C3.src;
	document.images['fotos'].src=C4.src;
	document.images['videos'].src=C5On.src;
	document.getElementById("CursosContenido").style.display = "none";
	document.getElementById("CursosCaracteristicas").style.display = "none";
	document.getElementById("CursosNiveles").style.display = "none";
	document.getElementById("CursosFotos").style.display = "none";
	document.getElementById("CursosVideos").style.display = "block";
}