var an = navigator.appName
  var ua = navigator.userAgent

  //Netscape
  var netscape = (an=="Netscape")

  //Netscape6 や Mozilla(オープンソース版)
  //     *ただしSafariがまじる
  var gecko = (ua.indexOf("Gecko")!=-1)

  //Netscape6のみ
  var n6 = (ua.indexOf("Netscape6")!=-1)

  //Netscape7のみ
  var n7 = (ua.indexOf("Netscape7")!=-1)

  //Oprea6のみ
  /*
  var o6 = (ua.search('opera(\ |\/)6') != -1)

  //Oprea7のみ
  var o7 = (ua.search('opera(\ |\/)7') != -1)
*/
  //Oprea8のみ
  var o8 = (ua.indexOf('opera(\ |\/)') != -1)

  //Safariの場合
  var saf = (ua.indexOf("Safari")!=-1)

  //DreamPassport
  var dp = (ua.indexOf("DreamPassport")!=-1)

  //PS2 NetFront
  var ps2nf = (ua.indexOf("AveFront")!=-1)

  //Internet Explorer
  //var ie = (an=="Microsoft Internet Explorer")
  var ie;
  if(an=="Microsoft Internet Explorer") {
	ie = true;
  }
  if(ua.indexOf('Opera')!=-1) {
	ie = false;
  }
  if(ua.indexOf("Safari")!=-1) {
	ie = false;
  }