// JavaScript to interpolate random images into a page.
    var ic = 7;     // Number of alternative images
    var pic1 = new Array(ic);  // Array to hold filenames
        
pic1[0] = "/docs/IO/3530/dublin.jpg";
pic1[1] = "/docs/IO/3530/prague.jpg";
pic1[2] = "/docs/IO/3530/paris.jpg";
pic1[3] = "/docs/IO/3530/nyu.jpg";
pic1[4] = "/docs/IO/3530/madrid.jpg";
pic1[5] = "/docs/IO/3530/florence.jpg";
pic1[6] = "/docs/IO/3530/berlin.jpg";
function pickRandom(range) {
if (Math.random)
return Math.round(Math.random() * (range-1));
else {
var now = new Date();
return (now.getTime() / 1000) % range;
}
}
// Write out an IMG tag, using a randomly-chosen image name.
var choice1 = pickRandom(ic);
document.writeln('<IMG SRC="'+pic1[choice1]+'" BORDER="0" usemap="headermap"/>');