function display()
{
 var bnr = new Array();
 bnr[0]="<a href='http://www.swedenrock.com/'><img src='images/commercial/SwedenRock_768x150.gif' width='442' height='80' alt='Commercial Banner'></a>";

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