if(navigator.userAgent.indexOf("MSIE") > -1){ //Internet Explorer
document.write('<!-'+'-[if IE]>');
document.write('<input type="button" style="width:120px; font-size:10px" value="お気に入りに追加"');
document.write(' onclick="window.external.AddFavorite(\'http://www.oku-chiropractic.com/\',\'Oku Chiropractic Office 自由が丘\')">');
document.write('<![endif]-'+'->');
}

else if(navigator.userAgent.indexOf("Firefox") > -1){ //Firefox
document.write('<input type="button" value="ブックマークに追加"');
document.write(' onclick="window.sidebar.addPanel(\'Oku Chiropractic Office 自由が丘\',\'http://www.oku-chiropractic.com/\',\'\');">');
}

else if(navigator.userAgent.indexOf("Opera") > -1){ //Opera
document.write('<a href="http://www.oku-chiropractic.com/" rel="sidebar" title="Oku Chiropractic Office 自由が丘">ブックマークに追加</a>');
}

else { //該当なし
void(0); //何もしない
}