function cre_cook(nom,contenu,jours)
{
      var expireDate = new Date();
      expireDate.setTime(expireDate.getTime() + jours*24*3600*1000);
      document.cookie = nom + "=" + escape(contenu) + ";expires=" + expireDate.toGMTString();
}
     
function lit_cook(nom)
{
      var deb,fin;
      deb = document.cookie.indexOf(nom + "=");
      if (deb >= 0)
	{
		deb += nom.length + 1;
		fin = document.cookie.indexOf(";",deb);
		if (fin < 0) fin = document.cookie.length;
		return unescape(document.cookie.substring(deb,fin));
	}
      return "";
}
     
function tue_cook(nom)
{
	cre_cook(nom,"",-1);
}