var how_many_ads = 2;

var now = new Date()

var sec = now.getSeconds()

var ad = sec % how_many_ads;

ad +=1;



if (ad==1) {

txt="";

url="http://www.chesstoday.net/";

alt="ChessToday.Net - Click here!";

banner="../images/banners/468x60/468x60_00.gif";

width="468";

height="60";

}



if (ad==2) {

txt="";

url="https://www.web-guardian.com/gmsquare/cgi-bin/store/commerce.cgi";

alt="";

banner="../images/banners/468x60/468x60_01.gif";

width="468";

height="60";

}



document.write('<center>');

document.write('<a href=\"' + url + '\" target=\"_top\">');

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>');