document.write("      <table width='580' border='0' cellspacing='0' cellpadding='0' height='60'>");
document.write("        <tr>");
document.write("          <td width='550'>");

var ad= new Array(2);
ad[1]="<a href=http://www.pcauto.com.cn/newcar/xczt/2004newcar/index.html target='_blank'><img src=http://www.pcauto.com.cn/images/ad/200401/20040115ztb_55060.gif border=0></a>";
ad[0]="<a href=http://www.pcauto.com.cn/newcar/xczt/2004newcar/index.html target='_blank'><img src=http://www.pcauto.com.cn/images/ad/200401/20040115ztb_55060.gif border=0></a>";
ad_now = new Date();
ad_id= ad_now.getSeconds() %2;
document.write(ad[ad_id]);

document.write("</td>");
document.write("        </tr>");
document.write("      </table>");