var agt = navigator.userAgent.toLowerCase();
  var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
  var is_mac    = (agt.indexOf("mac")!=-1);
  var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
  var is_opera = (agt.indexOf("opera") != -1);
  var is_nav  = ((agt.indexOf("mozilla")!=-1) && (agt.indexOf("spoofer")==-1)
                && (agt.indexOf("compatible") == -1) && (agt.indexOf("opera")==-1)
                && (agt.indexOf("webtv")==-1) && (agt.indexOf("hotjava")==-1));
  var is_safari    = (agt.indexOf("safari")!=-1);
  var is_icab    = (agt.indexOf("icab")!=-1);
  var is_major = parseInt(navigator.appVersion);
  var is_nav6up = (is_nav && (is_major >= 5));


  /* (Windows and (IE or Netscape)) またはサファリの場合、メニュー用のレイヤーを出力
	  "|| 変数名"の書式でブラウザ追加可能　*/
  if((is_win && (is_ie )) || is_safari || is_opera || is_firefox){
			document.write ("<div id=\"blog\" style=\"width:170; height:60; z-index: 10; position:absolute; left: 195px; top: 165px; visibility: hidden; z-index:10\" onMouseOver=\"MM_showHideLayers('blog','','show')\" onMouseOut=\"MM_showHideLayers('blog','','hide')\"><table style=\"z-index: 10 \"width=\"170\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\"><tr><td><a class=\"menulink\" href=\"http://seiron.iza.ne.jp/\"><img src=\"/seiron/indxgif/srn_hensyu.gif\" alt=\"『正論』編集部の彷徨記\" border=0></a></td></tr></table></div><div id=\"kizi\" style=\"width:170; height:60; z-index: 10; position:absolute; left: 195px; top: 205px; visibility: hidden; z-index:10\" onMouseOver=\"MM_showHideLayers('kizi','','show')\" onMouseOut=\"MM_showHideLayers('kizi','','hide')\"><table style=\"z-index: 10 \"width=\"170\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\"><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/mokji.html\"><img src=\"/seiron/indxgif/mokuji.gif\" alt=\"目次\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/0911/ronbun2-1.html\"><img src=\"/seiron/indxgif/keisai.gif\" alt=\"掲載論文\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/0708/genba.html\"><img src=\"/seiron/indxgif/anohi.gif\" alt=\"あの日の現場\" border=0></a></td></tr></table></div><div id=\"read\" style=\"width:170; height:60; z-index: 10; position:absolute; left: 195px; top: 245px; visibility: hidden; z-index:10\" onMouseOver=\"MM_showHideLayers('read','','show')\" onMouseOut=\"MM_showHideLayers('read','','hide')\"><table style=\"z-index: 10 \"width=\"170\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\"><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/srn-prom1.html\"><img src=\"/seiron/indxgif/prome.gif\" alt=\"読者のプロムナード\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/hen-hen1.html\"><img src=\"/seiron/indxgif/henhen.gif\" alt=\"編集者へ編集者から\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/hi-srn1.html\"><img src=\"/seiron/indxgif/hiseiron.gif\" alt=\"ハイ正論調査室です\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/0811/opi.html\"><img src=\"/seiron/indxgif/opi.gif\" alt=\"オピニオンプラザ\" border=0></a></td></tr></table></div><div id=\"hist\" style=\"width:170; height:60; z-index: 10; position:absolute; left: 195px; top: 285px; visibility: hidden; z-index:10\" onMouseOver=\"MM_showHideLayers('hist','','show')\" onMouseOut=\"MM_showHideLayers('hist','','hide')\"><table style=\"z-index: 10 \"width=\"170\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\"><tr><td><a class=\"menulink\" href=\"/seiron/maca/2005/maca/mac-top.html\"><img src=\"/seiron/indxgif/mac1.gif\" alt=\"マッカーサー米議会証言録\" border=0></a></td></tr></table></div>");

		}
  if((is_win && (is_ie )) || is_safari || is_opera || is_firefox){
		document.write ("<div id=\"blog\" style=\"width:700; height:400; z-index: 10; position:absolute; left: 195px; top: 165px; visibility: hidden; z-index:10\" onMouseOver=\"MM_showHideLayers('blog','','show')\" onMouseOut=\"MM_showHideLayers('blog','','hide')\"><table style=\"z-index: 10 \"width=\"170\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\"><tr><td><a class=\"menulink\" href=\"http://seiron.iza.ne.jp/\"><img src=\"/seiron/indxgif/srn_hensyu.gif\" alt=\"『正論』編集部の彷徨記\" border=0></a></td></tr></table></div><div id=\"kizi\" style=\"width:700; height:400; z-index: 10; position:absolute; left: 195px; top: 205px; visibility: hidden; z-index:10\" onMouseOver=\"MM_showHideLayers('kizi','','show')\" onMouseOut=\"MM_showHideLayers('kizi','','hide')\"><table style=\"z-index: 10 \"width=\"170\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\"><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/mokji.html\"><img src=\"/seiron/indxgif/mokuji.gif\" alt=\"目次\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/ronbun2-1.html\"><img src=\"/seiron/indxgif/keisai.gif\" alt=\"掲載論文\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/0708/genba.html\"><img src=\"/seiron/indxgif/anohi.gif\" alt=\"あの日の現場\" border=0></a></td></tr></table></div><div id=\"read\" style=\"width:700; height:400; z-index: 10; position:absolute; left: 195px; top: 245px; visibility: hidden; z-index:10\" onMouseOver=\"MM_showHideLayers('read','','show')\" onMouseOut=\"MM_showHideLayers('read','','hide')\"><table style=\"z-index: 10 \"width=\"170\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\"><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/srn-prom1.html\"><img src=\"/seiron/indxgif/prome.gif\" alt=\"読者のプロムナード\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/hen-hen1.html\"><img src=\"/seiron/indxgif/henhen.gif\" alt=\"編集者へ編集者から\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/1003/hi-srn1.html\"><img src=\"/seiron/indxgif/hiseiron.gif\" alt=\"ハイ正論調査室です\" border=0></a></td></tr><tr><td><a class=\"menulink\" href=\"/seiron/wnews/0811/opi.html\"><img src=\"/seiron/indxgif/opi.gif\" alt=\"オピニオンプラザ\" border=0></a></td></tr></table></div><div id=\"hist\" style=\"width:700; height:400; z-index: 10; position:absolute; left: 195px; top: 285px; visibility: hidden; z-index:10\" onMouseOver=\"MM_showHideLayers('hist','','show')\" onMouseOut=\"MM_showHideLayers('hist','','hide')\"><table style=\"z-index: 10 \"width=\"170\" border=\"0\" cellspacing=\"1\" cellpadding=\"0\"><tr><td><a class=\"menulink\" href=\"/seiron/maca/2005/maca/mac-top.html\"><img src=\"/seiron/indxgif/mac1.gif\" alt=\"マッカーサー米議会証言録\" border=0></a></td></tr></table></div>");

	}
	else{
		//表示しない
	}