if(navigator.userAgent.indexOf("NT 6\.0") >= 0){
  document.write('<link rel="stylesheet" href="http://www.gene-g.net/common/scripts/FontFamilyVista.css" type="text/css" media="all" />')
}
if(navigator.appVersion.indexOf("Win") >= 0){
  document.write('<link rel="stylesheet" href="http://www.gene-g.net/common/scripts/FontFamilyWin.css" type="text/css" media="all" />')
}
if(navigator.appVersion.indexOf("Mac") >= 0){
  document.write('<link rel="stylesheet" href="http://www.gene-g.net/common/scripts/FontFamilyMac.css" type="text/css" media="all" />')
}

//var os = (!navigator.appVersion.indexOf ("Win")) ? "Win" : "Mac";
//document.write ('<link rel="stylesheet" href="http://www.gene-g.net/common/scripts/FontFamily' + os + '.css" type="text/css" media="all" />')