// Set up the image files to be used for the first book cover.
cover1 = new Array
// To add more cover images, continue with the pattern below, adding to the array.
	("../images/bioe_cover01.jpg",
	 "../images/bioe_cover03.jpg",
	 "../images/bioe_cover05.jpg",
	 "../images/bioe_cover07.jpg",
	 "../images/bioe_cover09.jpg",
	 "../images/bioe_cover11.jpg",
	 "../images/bioe_cover13.jpg",
	 "../images/bioe_cover15.jpg",
	 "../images/bioe_cover17.jpg",
	 "../images/bioe_cover19.jpg",
	 "../images/bioe_cover21.jpg",
	 "../images/bioe_cover23.jpg",
	 "../images/bioe_cover25.jpg",
	 "../images/bioe_cover27.jpg",
	 "../images/bioe_cover29.jpg",
	 "../images/bioe_cover31.jpg",
	 "../images/bioe_cover33.jpg",
	 "../images/bioe_cover35.jpg",
	 "../images/bioe_cover37.jpg",
	 "../images/bioe_cover39.jpg")

// Set up the links to the first set of books.
// The first link in the array matches the first cover listed in the book cover array, etc.
link1 = new Array
	("http://berkeley.worldcat.org/oclc/233933686?referer=list_view",
	 "http://berkeley.worldcat.org/oclc/230802668?referer=list_view",
	 "http://berkeley.worldcat.org/oclc/154798921?referer=list_view",
	 "http://berkeley.worldcat.org/oclc/222161892?referer=list_view",
	 "http://berkeley.worldcat.org/oclc/145940628?referer=list_view",
	 	"http://berkeley.worldcat.org/oclc/232647303?referer=list_view",
	 	"http://berkeley.worldcat.org/oclc/187293976?referer=list_view",
	 	"http://berkeley.worldcat.org/oclc/181069648?referer=list_view",
	 	"http://berkeley.worldcat.org/oclc/230180361?referer=list_view",
	 	"http://berkeley.worldcat.org/oclc/234234136?referer=list_view",
	 		"http://berkeley.worldcat.org/oclc/309835217?referer=list_view",
	 		"http://berkeley.worldcat.org/oclc/230199554?referer=list_view",
	 		"http://berkeley.worldcat.org/oclc/233547461?referer=list_view",
	 		"http://berkeley.worldcat.org/oclc/156830849?referer=list_view",
	 		"http://berkeley.worldcat.org/oclc/259902177?referer=list_view",
	 			"http://berkeley.worldcat.org/oclc/262694333?referer=list_view",
	 			"http://berkeley.worldcat.org/oclc/244768249?referer=list_view",
	 			"http://berkeley.worldcat.org/oclc/226279496?referer=list_view",
	 			"http://berkeley.worldcat.org/oclc/225820367?referer=list_view",
	 			"http://berkeley.worldcat.org/oclc/237195011?referer=list_view")

// This sets a counter to the total number of items in each of the two arrays.
// The value of the counter is used by the random number generator.
imgCt1 = cover1.length;

/* This function selects a random number to determine which book cover image
will be displayed, and the corresponding link to the book is activated.   */
function showImage1(){
	if (document.images) {    // if the document can handle images (it can)
	randomNum1 = Math.floor ((Math.random() * imgCt1))   // This is the random number generator
	}
// the XHTML is generated (book cover #1 with active link to the full text)
document.write('<a href="'+link1[randomNum1]+'"><img src="'+cover1[randomNum1]+'"></a>');
}