var text = [
  //"投中亞姐冠軍, 送你500金錢看影片大行動!",
  "馬上玩論壇FLASH 遊戲，賺金錢看戲",
  "贏取改編歌詞王可獲$200超市現金券+免費看片",
  //"填問卷調查, 有388元大利是",
  "香港二手車網上買賣平臺費用全免"
];
var link = [
  //"http://www.say.cc/thread-100157-1-1.html",
  "http://www.say.cc/plugins.php?p=nkflash",
  "http://www.say.cc/thread-143029-1-1.html",
  //"http://www.webshare.cc/research_2010.php",
  "http://easy.hk"
];

var ad_length = text.length;
var rand_num = Math.ceil(Math.random()*(ad_length))-1;   

document.write("<a href='"+link[rand_num]+"'>"+text[rand_num]+"</a>");