//Preload  images
if(document.images){
var help1 = new Image();
var help2 = new Image();
var recommend1 = new Image();
var recommend2 = new Image();
var questions1 = new Image();
var questions2 = new Image();
var glossary1 = new Image();
var glossary2 = new Image();

help1 = "/images/helpa.gif";
help2 = "/images/helpb.gif";
recommend1 = "/images/recommenda.gif";
recommend2 = "/images/recommendb.gif";
questions1 = "/images/questionsa.gif";
questions2 = "/images/questionsb.gif";
glossary1 = "/images/glossarya.gif";
glossary2 = "/images/glossaryb.gif";

var explore1 = new Image();
var explore2 = new Image();
var protect1 = new Image();
var protect2 = new Image();
var visit1 = new Image();
var visit2 = new Image();
var film1 = new Image();
var film2 = new Image();
var educate1 = new Image();
var educate2 = new Image();

explore1 = "/images/exploreb.gif.gif";
explore2 = "/images/exploreb.gif";
protect1 = "/images/protecta.gif";
protect2 = "/images/protectb.gif";
visit1 = "/images/visita.gif";
visit2 = "/images/visitb.gif";
film1 = "/images/filma.gif";
film2 = "/images/filmb.gif";
educate1 = "/images/educatea.gif";
educate2 = "/images/educateb.gif";
}