function setInit(){
  var recommendPage = document.getElementById("recommend");
  var makerPage     = document.getElementById("maker");

  setRandomLink(recommendPage,  3, "./itiosi/recommend");
}

function setRandomLink(name, number, prefix){
  var randomNumber = Math.floor(Math.random() * number) + 1;

  var link = prefix + randomNumber + ".html";
  if(name.setAttribute){
     name.setAttribute("href", link);
  }
  else{
     name.href = link;
  }
}

if (window.addEventListener){
  window.addEventListener("load", setInit, false);
}
else if(window.attachEvent){
  window.attachEvent("onload", setInit);
}
else{
  window.onload = setInit;
}