function thumb(ImageToChange, ImageToShow) {
if (document.images) { document[ImageToChange].src = ImageToShow; }
}

if (document.images) {
t1 = new Image;
t1.src = "images/thumb1o.jpg";
t2 = new Image;
t2.src = "images/thumb2o.jpg";
t3 = new Image;
t3.src = "images/thumb3o.jpg";
t4 = new Image;
t4.src = "images/thumb4o.jpg";
t5 = new Image;
t5.src = "images/thumb5o.jpg";


 }