function creerCookie (nom, valeur, expiration) {
	var exdate = new Date();
	exdate.setDate (exdate.getDate() + expiration);
	
	document.cookie = nom + "=" + escape(valeur) + ((expiration == null) ? "" : ";expires=" +exdate.toGMTString()); 
}

function recupCookie (nom, vide) {
	if (document.cookie.length > 0)
	{
		c_start=document.cookie.indexOf(nom + "=");
		if (c_start != -1)
		{
			c_start = c_start + nom.length + 1; 
			c_end = document.cookie.indexOf(";",c_start);

			if (c_end == -1) {
				c_end = document.cookie.length;
			}
		
			return unescape (document.cookie.substring(c_start,c_end));
		}
	}
	
	return vide; 
}