// JavaScript Document


var chgContent = chgAd[1] // デフォルトで表示されるもの（クッキーをオフにしている場合など）
var cExpires
var nowDate = new Date()
nowDate.setDate(nowDate.getDate()+7) //１週間後にクッキー消滅
cExpires = nowDate.toGMTString()
var cookieValue = document.cookie
var startOfValue = cookieValue.indexOf(" seenJsAd=")
if (startOfValue == -1) {
   startOfValue = cookieValue.indexOf("seenJsAd=")
   if (startOfValue == -1) {
      seenJsAd = 0
      chgContent = chgAd[seenJsAd]
   }
}
if (seenJsAd) {
   startOfValue = cookieValue.indexOf("=", startOfValue) + 1
   var endOfValue = cookieValue.indexOf(";", startOfValue)
   if (endOfValue == -1) {
      endOfValue = cookieValue.length
   }
   seenJsAd = Number(cookieValue.substring(startOfValue, endOfValue))
   if (seenJsAd<chgAd.length-1) {
      seenJsAd++
   } else {
      seenJsAd = 0
   }
   chgContent = chgAd[seenJsAd]
}
document.cookie = "seenJsAd=" + seenJsAd + ";expires=" + cExpires + ";"
function showpara(num) {
   if(document.getElementById) {
      document.getElementById("chap" + num).style.display = "block";
      document.getElementById("read" + num).style.display = "none";
      document.getElementById("close" + num).style.display = "inline";
   }
   return false;
}
function hidepara(num) {
   if(document.getElementById) {
      document.getElementById("chap" + num).style.display = "none";
      document.getElementById("read" + num).style.display = "inline";
      document.getElementById("close" + num).style.display = "none";
   }
   return false;
}