function setActiveStyleSheet(title2)
{	
	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") == title2) a.disabled = false;
   		}
	}
}

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;
}

//Au load	
var cookie = readCookie("style");  

if (cookie == null || cookie == "null")
{
	title2 = getPreferredStyleSheet();
	//pour s'assurer qu'une feuille de style est appliquée au load sur tous les browsers
	if (title2 == null || title2 == "null" || title2 == "" )
	{		 
		title2 = "gros";
	}	
}
else
{	
	title2 = cookie;	
}
setActiveStyleSheet(title2);

//window.onunload = function(e)
function onunloadPage()
{	
	var title2 = getActiveStyleSheet();
	createCookie("style", title2, 365);
}

//Fonction pour changer la feuille de style
function changeTypo()
{	
	var active = getActiveStyleSheet();
	
	var title2	
	if (active == null || active == "null")
	{		 
		title2 = "gros";
	}	
	else
	{	
		if (active == "gros")
		{
			title2 = "petit";
		}
		if (active == "petit")
		{			
			title2 = "gros";	
		}	
		if (active == "default")
		{
			title2 = "petit";
		}
	}
	setActiveStyleSheet(title2);
}