function display() {

 var bnr = new Array();

bnr[0]="<a href='http://www.rocktheboat.no/'><img src='images/commercial/Rock The Boat header.gif' width='442' height='80' alt='Commercial Banner'></a>";


 var rannum=Math.round(Math.random()*(bnr.length-1));
 document.write(bnr[rannum]);
}