var how_many_ads = 4;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
url="http://www.gardencn.com";
alt="花园集团";
banner="/images/banner1.gif";
width="468";
height="60";
}
if (ad==2) {
url="http://www.gardencn.com";
alt="花园集团";
banner="/images/banner2.gif";
width="468";
height="60";
}
if (ad==3) {
url="http://www.gardencn.com";
alt="花园集团";
banner="/images/banner3.gif";
width="468";
height="60";
}
if (ad==4) {
url="http://www.gardencn.com";
alt="花园集团";
banner="/images/banner4.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></a>');
document.write('</center>');