//------ ON LOAD de la page ------  
//Appelle de la fonction de lecture du cookie	
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 = "defaut";
	}	
}
else
{	
	//Le cookie retour la valeur du title css
	title2 = cookie;	
}
setActiveStyleSheet(title2);
//------ FIN - ON LOAD de la page ------ 

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);
		//if (c.indexOf(nameEQ) == 0) alert(c.substring(nameEQ.length,c.length));
	}
  return null;
}

//Fonction qui change le css actif
function setActiveStyleSheet(title2)
{	

	//créer le cookie
    var date = new Date();
    date.setTime(date.getTime()+(180*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
    document.cookie = "style =" + title2 + expires + "; path=/"
	
	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;
			}
   		}
	}
	
	//Modifier le source de l'image bouton
	//var css_bt = document.getElementById('textecss').src;
	
	//if (title2 == "grand"){
		//document.getElementById('textecss').src = css_bt.replace("acc_bt_texte_agrandir.gif", "acc_bt_texte_reduire.gif");
	//}else{
		//document.getElementById('textecss').src = css_bt.replace("acc_bt_texte_reduire.gif", "acc_bt_texte_agrandir.gif");
	//}
}

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;
}

//Change la feuille de style active
function changeTypo()
{	
	//Récupère le title du css actif
	var active = getActiveStyleSheet();
	
	//Fait la conversion
	var title2	
	if (active == null || active == "null"){title2 = "grand";}	
	else
	{	
		if (active == "grand"){title2 = "defaut";}
		if (active == "defaut"){title2 = "grand";}	
		if (active == "default"){title2 = "defaut";}
	}
	//Appelle de la fonction qui active le css correspondant au title2
	setActiveStyleSheet(title2);
}