function openNewWin(url) {
   window.open(url, '', 'width=900,height=700,toolbar=yes,location=yes,directories=no,status=yes,menubar=yes,scrollbars=yes,copyhistory=yes,resizable=yes');
}

function openPDFWin(url) {
   window.open(url, '', 'width=900,height=700,toolbar=no,location=no,directories=no,status=yes,menubar=no,scrollbars=yes,copyhistory=yes,resizable=yes');
}

function getRandomIndex() {
   var rdIndex, rand;

   rand = Math.random();
   rdIndex = Math.floor(rand*(randomimages.length));


   return rdIndex;
}