if (document.images) {
image0 = new Image;
image1 = new Image;
image2 = new Image;
image0.src = 'images/image1.jpg';
image1.src = 'images/image2.jpg';
image2.src = 'images/image3.jpg';
} else {
image0 = '';
image1 = '';
image2 = '';
document.rollimg = '';
}
var cap = ['Aerial view of Dorney Lake',
'View from the balcony',
'The Boathouse floodlit for a private party'];

function rollover(n) {
document.rollimg.src = window['image'+n].src;
document.getElementById('caption').innerHTML = cap[n];
}