quote = new Array(); quote[0]="1"; quote[1]="2"; quote[2]="3"; var date = new Date(); var sec = date.getSeconds(); var index = (sec % quote.length); var topbanner = document.getElementById("topbanner"); var x = topbanner.className.match(/banner topbg([0-9]+)/)[1]; topbanner.className = topbanner.className.replace("banner topbg" + x,"banner topbg" + quote[index]);