if (document.images) {
  image0 = new Image;
  image1 = new Image;
  image2 = new Image;
  image3 = new Image;
  image4 = new Image;
  image5 = new Image;
  image6 = new Image;
  image7 = new Image;
  image8 = new Image;
  image9 = new Image;
  image10 = new Image;
  image11 = new Image;
  image12 = new Image;
  image13 = new Image;
  image14 = new Image;
  image15 = new Image;
  image16 = new Image;
  image17 = new Image;
  image0.src = 'images/by_artist/Corcos_Spring.jpg';
  image1.src = 'images/by_artist/Corcos_Lecture.jpg';
  image2.src = 'images/by_artist/Corcos_Slippers.jpg';
  image3.src = 'images/by_artist/inv_call_guitar.gif';
  image4.src = 'images/by_artist/inv_call_corn.gif';
  image5.src = 'images/by_artist/McNamara_Interior79.jpg';
  image6.src = 'images/by_artist/McNamara_Boardwalk.jpg';
  image7.src = 'images/by_artist/McNamara_Stilllife.jpg';
  image8.src = 'images/by_artist/Burdickimage1.jpg';
  image9.src = 'images/by_artist/Burdickimage2.jpg';
  image10.src = 'images/by_artist/Burdickimage3.jpg';
  image11.src = 'images/by_artist/inv_beaman_winterlandscape.gif';
  image12.src = 'images/by_artist/inv_beaman_westernlandscape.gif';
  image13.src = 'images/by_artist/homer1.jpg';
  image14.src = 'images/by_artist/homer2.jpg';
  image15.src = 'images/by_artist/homer3.jpg'; 
  image16.src = 'images/Koopman.jpg';
  image17.src = 'images/by_artist/koopman2.jpg'; 
} else {
  image0 = '';
  image1 = '';
  image2 = '';
  image3 = '';
  image4 = '';
  image5 = '';
  image6 = '';
  image7 = '';
  image8 = '';
  image9 = '';
  image10 = '';
  image11 = '';
  image12 = '';
  image13 = '';
  image14 = '';
  image15 = '';
  image16 = '';
  image17 = '';
  document.rollimg = '';
}

//repeat captions within the variable brackets as indicated. Separate with a comma.

var cap = ['<b>Ode to Spring</b><br>ink with white watercolor highlights,<br>10 x 11 3/8 inches (sight)<br><br>', // Caption 0
           '<b>The Lecture</b><br>ink with white watercolor highlights,<br>11 1/4 x 13 1/4 inches (sight)<br><br>', // Caption 1
           '<b>His Slippers</b><br>ink with white watercolor highlights,<br>7 3/8 x 10 inches (sight)<br><br>', // Caption 2
           '<b>Guitar with Fluted Bowl</b><br>oil on canvas, 19 x 26 inches<br><br>', // Caption 3
           '<b>Corn</b><br>oil on board, 20 x 24 inches<br><br>', // Caption 4
           '<b>Interior 7-79</b><br>oil on masonite, 22 x 18 inches<br>', // Caption 5
           '<b>Boardwalk, 1963</b><br>oil on canvas, 20 x 30 inches<br>', // Caption 6
           '<b>Still Life</b><br>oil on canvas, 16 x 20 inches<br>', // Caption 7
           '<b>Autumn Landscape</b><br>oil on canvas on board, 5 7/8 x 8 1/8 inches<br><br>', // Caption 8
           '<b>Autumn Hillside, 1909</b><br>oil pencil on paper, 6 1/2 x 4 5/8 inches (sight)<br>', // Caption 9
           '<b>Nude, 1898</b><br>ink on paper, 6 1/2 x 4 1/2 inches<br>', // Caption 10
           '<b>Winter Landscape</b><br>oil on canvas, 14 x 20 inches<br><br>', // Caption 11
           '<b>Spring, Western Landscape</b><br>oil on canvas, 12 x 18 inches<br><br>', // Caption 12
           '<b>Illustrated autograph letter</b> (no.1)<br>Ink on paper,<br>4 3/4 x 7 3/4 inches (sheet with sketch and letter)<br><br>', // Caption 13
           '<b>Illustrated autograph letter</b> (no.2)<br>Ink on paper,<br>4 3/4 x 7 3/4 inches (sheet with sketch and letter)<br><br>', // Caption 14
           '<b>Illustrated autograph letter</b> (no.3)<br>Ink on paper,<br>4 3/4 x 7 3/4 inches (sheet with sketch and letter)<br><br>', // Caption 15
           '<b>The Goat Girl</b>, 1904<br>oil on canvas, 24 x 32 inches<br><br>', // Caption 16
           '<b>Processional, Chioggia</b>, 1907<br>oil on canvas, 28 1/2 x 23 5/8 inches,<br>in the original Italian frame<br><br>']; // Caption 17

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