var how_many_ads = 2;
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
url="/th/ad/flash_ban.swf";
}
if (ad==2) {
url="/th/ad/flash_ban.swf";
}
 document.write('<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"'
    + 'width="555" height="90"'
    + 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">'
    + '<param name="movie" value=\"' + url + '\" /><param name="quality" value="high" /><param name="bgcolor" value="#FFFFFF" />'
    + '<embed src=\"' + url + '\" quality="high" bgcolor="#FFFFFF" '
    + 'width="555" height="90" name=obj2" align="middle"'
    + 'play="true"'
    + 'loop="false"'
    + 'quality="high"'
    + 'allowScriptAccess="sameDomain"'
    + 'type="application/x-shockwave-flash"'
    + 'pluginspage="http://www.macromedia.com/go/getflashplayer">'
    + '<\/embed>'
    + '<\/object>');