// See : http://defr.org/blog/posts/268-Stylesheet_switching,_en_Javascript

  var styleSwitch = {
	set:function(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;
		}
	  }
	  document._currentStyleSheet = title;
	},
	
	get:function() {
	  return document._currentStyleSheet;
	},
	
	storePref:function(title) {
	  // -- Set style (see function above)
	  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;
		}
	  }
	  document._currentStyleSheet = title;
	  // -- Store in cookie for a year
	  var date = new Date();
	  date.setTime(date.getTime() + 365 * 24 * 3600 * 1000);
	  EcrireCookie('style',title,date);
	},
	
	getPref:function() {
	  style = LireCookie('style');
	  if (style != null) return style;
	   
	  var a = document.getElementsByTagName("link");
	  for(var i=0; a[i]; i++) {
		if(a[i].getAttribute("rel").indexOf("Style") != -1 && a[i].getAttribute("rel").indexOf("Alt") == -1 && a[i].getAttribute("title"))
			return a[i].getAttribute("title");
	  }
	  return null;
	  
	}
	
  }
  
function EcrireCookie(nom, valeur)
{
   var argv=EcrireCookie.arguments;
   var argc=EcrireCookie.arguments.length;
   var expires=(argc > 2) ? argv[2] : null;
   var path=(argc > 3) ? argv[3] : null;
   var domain=(argc > 4) ? argv[4] : null;
   var secure=(argc > 5) ? argv[5] : false;
   document.cookie=nom+"="+escape(valeur)+
   ((expires==null) ? "" : ("; expires="+expires.toGMTString()))+
   ((path==null) ? "" : ("; path="+path))+
   ((domain==null) ? "" : ("; domain="+domain))+
   ((secure==true) ? "; secure" : "");
}

function getCookieVal(offset)
{
   var endstr=document.cookie.indexOf (";", offset);
   if (endstr==-1) endstr=document.cookie.length;
   return unescape(document.cookie.substring(offset, endstr));
}

function LireCookie(nom)
{
   var arg=nom+"=";
   var alen=arg.length;
   var clen=document.cookie.length;
   var i=0;
   while (i < clen){
      var j=i+alen;
      if (document.cookie.substring(i, j)==arg) return getCookieVal(j);
      i=document.cookie.indexOf(" ",i)+1;
      if (i==0) break;
   }
   return null;
}