<script language="JavaScript">
var how_many_ads = 5
var now = new Date()
var sec = now.getSeconds()
var ad = sec % how_many_ads;
ad +=1;
if (ad==1){
url="";
alt="ad1";
banner="图片/01.jpg";
width="440";
height="230";
}
if (ad==2) {
url="";
alt="ad2";
banner="图片/02.jpg";
width="440";
height="230";
}
if (ad==3) {
url="";
alt="ad3";
banner="图片/03.jpg";
width="440";
height="230";
}
if (ad==4) {
url="";
alt="ad4";
banner="images/04.jpg";
width="440";
height="230";
}
if (ad==5) {
url="";
alt="ad5";
banner="图片/05.jpg";
width="440";
height="230";
}
document.write('<center>');
document.write('<a href=\"' + url + '\" target=\"_blank\">');
document.write('<img src=\"' + banner + '\" width=')
document.write(width + ' height=' + height + ' ');
document.write('alt=\"' + alt + '\" border=0>
');
document.write('</center>');
--></script>
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