var Tools = {
  createCookie: function(name, value,days) {
	if (days) {
	  var date = new Date();
	  date.setTime(date.getTime()+(days*24*60*60*1000));
	  var expires = "; expires="+date.toGMTString();
	}else var expires = "";
	  document.cookie = name+"="+value+expires+"; path=/";
  },

  readCookie: function(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;
  },

  eraseCookie: function(name) {
	Tools.createCookie(name,"",-1);
  }
};