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://nordfx-asia.com/nordfx_open_account.htm";
alt="免费送金账户!";
banner="img/100x300_welcome.png";
}

if (ad==2) {
url="http://nordfx-asia.com/nordfx_open_account.htm";
alt="积分换ipad2";
banner="img/100_300_ipad2.png";
}

if (ad==3) {
url="http://nordfx-asia.com/nordfx_open_account.htm";
alt="全年奖金46000美元";
banner="img/100_300_demo.png";
}

if (ad==4) {
url="http://nordfx-asia.com/nordfx_open_account.htm";
alt="积分换iPhone4";
banner="img/100_300_shop.png";
}

document.write('<a href=\"' + url + '\" target=\"_blank\"  OnmouseOver=\"window.status=\'welcome!\';return true;\" OnMouseOut=\"window.status=\'welcome!\';\">');
document.write('<img src=\"' + banner + '\" width=100 height=300 ')
document.write('alt=\"' + alt + '\" border=0></a>');