//random banner for top frame
function random_banner(){
  var i=0;
  banners = new Array();
//  banners[0] = '<a href="/eng/news/petwalk10_index.asp"><IMG SRC="/upload/banner/petwalk10_banner_e.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[0] = '<a href="http://vgift.spca.org.hk/" target="_blank"><IMG SRC="/upload/banner/banner_vgift_eng.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[1] = '<a href="/eng/news/stop_seal_trade_main.asp" target="_blank"><IMG SRC="/upload/nosealhunt_banner_e.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[2] = '<a href="/eng/education/la2008_comic_book/la2008_comic_book.html" target="_blank"><IMG SRC="/upload/educb_web_eng.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[3] = '<a href="/eng/members/how.asp"><IMG SRC="/upload/banner/membership_web_e.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
//  banners[4] = '<a href="/eng/news/showDetail.asp?id=818"><IMG SRC="/upload/sefund_eng.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[4] = '<a href="/eng/care/board.asp"><IMG SRC="/upload/bannerad_boarding.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[5] = '<a href="/eng/care/groom.asp"><IMG SRC="/upload/bannerad_grooming.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[6] = '<a href="/eng/welfare/snap_voucher.asp"><IMG SRC="/upload/banner/snap_banner_e2.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[7] = '<a href="/eng/news/showDetail.asp?id=118"><IMG SRC="/upload/banner/banner2.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[8] = '<a href="/eng/welfare/snap_voucher.asp"><IMG SRC="/upload/banner/snap_banner_e1.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  banners[9] = '<a href="/eng/members/insurance_form.asp"><IMG SRC="/upload/banner/petinsurance_banner_e2.gif" WIDTH=640 HEIGHT=90 border=0></a>';
//  banners[2] = '<a href="news/petwalk10_index.asp"><IMG SRC="/upload/banner/topbanner_raffle09_e.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
//  banners[3] = '<a href="javascript:;"><IMG SRC="/upload/banner/topbanner_movie09_e.jpg" WIDTH=640 HEIGHT=90 border=0></a>';
  today = new Date();
  i=today.getSeconds();
  n=banners.length;
//  return banners[i-Math.round((i-1)/n)*n];
  return banners[Math.floor(Math.random()*banners.length)];
}
