// This assumes the fortunes are in a JavaScript array variable
// called "fortunes". This code must be at the very bottom of
// the HTML file.
function update() {
var which = Math.floor(Math.random()*fortunes.length);
var randomFortune = fortunes[which];
randomFortune = randomFortune.replace("~", "<br />~");
document.getElementById('fortune').innerHTML = randomFortune;
}
document.getElementById('update').onclick = update;
update();