//MOSTRAR / OCULTAR CAPAS
function muestra(me)
{
	document.getElementById(me).style.visibility="visible";
	document.getElementById(me).style.display="block";
}
function oculta(me)
{
	document.getElementById(me).style.visibility="hidden";
	document.getElementById(me).style.display="none";
}

//LINKS EXTERNOS
function externalLinks(idioma)
{
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++)
	{
		var anchor = anchors[i];
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")
		{
			var titulo = anchor.getAttribute("title");
			
			switch (idioma)
			{
				case "es":
				{ 
					anchor.title = titulo + " (se abre en ventana nueva).";
					break
				}
				case "en":
				{ 
					anchor.title = titulo + " (opens in new window).";
					break
				}
				case "de":
				{ 
					anchor.title = titulo + " (opens in new window).";
					break
				}
				default:
				{ 
					anchor.title = titulo + " (se abre en ventana nueva).";
					break
				}
			}
			anchor.target = "_blank";
		}
	}
}

function fondo()
{
	var imagenes = new Array()
	imagenes[1] = '../img/fondo.gif'
	imagenes[2] = '../img/fondo2.gif'
	imagenes[3] = '../img/fondo3.gif'
	imagenes[4] = '../img/fondo4.gif'
	
	var x = Math.floor(Math.random() * imagenes.length);
	var randomImg = imagenes[x - 1];
	
	$("body").css("background-image","url("+randomImg+")");
}