var apAd = get_rnd(0, numBan-1);
document.write("<a href='" + banLnk[apAd] + "' target='_blank'><img src='" + banPre + banImg[apAd] + "' border='0' width='" + banWid[apAd] + "' height='" + banHgt[apAd] + "'></a>");