if (document.images) {
  	upcomingOn = new Image();
  	upcomingOn.src = "../images/navs/local/seminars/upcoming_on.gif";
  	pastOn = new Image();
  	pastOn.src = "../images/navs/local/seminars/past_on.gif";
  	registerOn = new Image();
  	registerOn.src = "../images/navs/local/seminars/register_on.gif";
  	upcomingOff = new Image();
  	upcomingOff.src = "../images/navs/local/seminars/upcoming.gif";
  	pastOff = new Image();
  	pastOff.src = "../images/navs/local/seminars/past.gif";
 	registerOff = new Image();
  	registerOff.src = "../images/navs/local/seminars/register.gif";
}