function browchk(){
  browse = navigator.appName;
  document.write("あなたのブラウザ："+browse+"<br>");
  brow0 = "パソコン";
  if (browse.indexOf("DoCoMo") >= 0) brow0 = "DoCoMo";
  if (browse.indexOf("J-PHONE") >= 0) brow0 = "J-PHONE";
  if (browse.indexOf("UP.Browser") >= 0) brow0 = "EZweb";
  rslt = confirm("あなたは"+brow0+"ですね？\nトップページに戻ります。");
  if (rslt == true) location.href = "/";
}