function setActiveStyleSheet(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
	// Francisco: Resaltar la opción del menú
	try {
		document.getElementById("flash_si").className = "";
		document.getElementById("flash_no").className = "";
		document.getElementById("drops").className = "";
		document.getElementById(title).className = "actual";
	}	catch (err) {}
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {	
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = "";
if (cookie) { title = cookie; }
else {
	var title = getPreferredStyleSheet();
	if (flashVersion() == 0) title = "flash_no";
}
setActiveStyleSheet(title);

/*
Detecta la versión de Flash. 
http://www.quirksmode.org/js/flash.html
*/
function flashVersion ()
{
	var flashinstalled = 0;
	var flashversion = 0;
	MSDetect = "false";
	if (navigator.plugins && navigator.plugins.length)
	{
		x = navigator.plugins["Shockwave Flash"];
		if (x)
		{
			flashinstalled = 2;
			if (x.description)
			{
				y = x.description;
				flashversion = y.charAt(y.indexOf('.')-1);
			}
		}
		else
			flashinstalled = 1;
		if (navigator.plugins["Shockwave Flash 2.0"])
		{
			flashinstalled = 2;
			flashversion = 2;
		}
	}
	else if (navigator.mimeTypes && navigator.mimeTypes.length)
	{
		x = navigator.mimeTypes['application/x-shockwave-flash'];
		if (x && x.enabledPlugin)
			flashinstalled = 2;
		else
			flashinstalled = 1;
	}
	else {
		// MSDetect = "true"
		// IE flash detection.
		for (var i=10; i>0; i--){
			flashversion = 0;
			try{
				var flash = new ActiveXObject("ShockwaveFlash.ShockwaveFlash." + i);
				flashversion = i;
				return flashversion;
			}
			catch(e){
			}
		}
	}
		
	return flashversion;
}