function write_quote() {
 var quotes = [
  'no animals were harmed while making this page',
  'made in ulm',
  'this page was handmade',
  'Get <a href="http://www.mozilla.org/products/firefox/">FireFox</a> :-)'
 ];
 var r = Math.round(Math.random() * (quotes.length-1));
 // write the quote
 document.write(quotes[r]);
 // or replace an HTML element:
 // document.getElementById("quote").innerHTML = quotes[r];
}