var nopics = 12;
//set up variable for number of pictures
descr = new Array(nopics);
descr[1] = "From the Rubaiyat of Omar Kayyam";
descr[2] = "From Pride and Prejudice by Jane Austen";
descr[3] = "Westron Winde, Anon, C16";
descr[4] = "Music when sweet voices die by Shelley";
descr[5] = "Parting at Morning by Robert Browning";
descr[6] = "Baby Sardine by Spike Milligan";
descr[7] = "From Sounds of Silence by Paul Simon";
descr[8] = "Eternity by William Blake";
descr[9] = "Reference to Domesday Book in the Anglo Saxon Chronicle, 1087";
descr[10] = "Remember by Christina Rosetti";
descr[11] = "Monday's child is fair of face . . . , Traditional";
descr[12] = "From As You Like It by William Shakespeare";
//provide descriptions for ALT part of image tag
var dn = Math.random() * nopics;
var ra = Math.floor(dn)
var rn = ++ra;
//select an image at random
var quoteno = "Quote" + rn + ".gif";
var imgout = "<IMG SRC=\"" + quoteno + "\" ALT=\"" + descr[rn] + "\">";
document.write(imgout)
//insert image in document