var how_many_ads = 1;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;

if (ad==1) {
txt="";
url="http://www.weatherblip.com/cgi-bin/weather/hw3.cgi?forecast=usthreatadvisory";
alt="THREATCON 3";
banner="http://www.weatherblip.com/threat/elevated.gif";
width="120";
height="60";
}

document.write('<CENTER>');
document.write('<A href=\"' + url + '\" target=\"_parent\">');
document.write('<IMG src=\"' + banner + '\" width=')
document.write(width + ' height=' + height + ' ');
document.write('alt=\"' + alt + '\" border="0"><BR>');
document.write('<SMALL>' + txt + '</SMALL></A>');
document.write('</CENTER>');