/*generales*/
function $(v) { return(document.getElementById(v))}
function $S(v) { return($(v).style); }
/*opacidad*/
function fadeIn(objId,opacity) {
  if (document.getElementById) {
    obj = document.getElementById(objId);
    if (opacity <= 100) {
      setOpacity(obj, opacity);
      opacity += 10;
      window.setTimeout("fadeIn('"+objId+"',"+opacity+")", 40);
    }
  }
}

function setOpacity(obj, opacity) {
  opacity = (opacity == 100)?99.999:opacity;
  // IE/Win
  obj.style.filter = "alpha(opacity:"+opacity+")";
  // Safari<1.2, Konqueror
  obj.style.KHTMLOpacity = opacity/100;
  // Older Mozilla and Firefox
  obj.style.MozOpacity = opacity/100;
  // Safari 1.2, newer Firefox and Mozilla, CSS3
  obj.style.opacity = opacity/100;
}
function initImage() {
  imageId = 'imgCabecera';
  image =$(imageId);
  setOpacity(image, 0);
  image.style.visibility = 'visible';
  fadeIn(imageId,0);
}
/* menus desplegables */
sfHover = function() {
	var sfEls = $("nav").getElementsByTagName("li");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			var modulo = this.getElementsByTagName("ul");
			var linking = this.getElementsByTagName("a")
			modulo = modulo[0];
			if(modulo)
				{
					modulo.style.visibility = 'visible';
					var identificador = modulo.getAttribute('id')
					//fadeIn(identificador,0)
				}
		}
		sfEls[i].onmouseout=function() {
			var modulo = this.getElementsByTagName("ul");
			if(modulo[0])
				{
				modulo[0].style.visibility = 'hidden';
				}
		}
	}
}
/* ini 
if (window.attachEvent) window.attachEvent("onload", sfHover);*/