// set Variable

var agent = navigator.userAgent;

  if(navigator.appVersion.indexOf('Mac') > 1){

   document.write('<link rel="stylesheet" type="text/css" href="css/mac.css" media="screen">');

   document.write('<BASEFONT SIZE="3">');

  }else if(agent.indexOf('Win') >= 0 && navigator.appVersion.indexOf('M')!=-1){

   document.write('<link rel="stylesheet" type="text/css" href="css/win.css" media="screen">');

   document.write('<BASEFONT SIZE="2">');

  }else if(agent.indexOf('Win') >= 0 && navigator.appName.charAt(0) == "N" && navigator.appVersion.charAt(0) >= 4){

   document.write('<link rel="stylesheet" type="text/css" href="css/win.css" media="screen">');

   document.write('<BASEFONT SIZE="3">');

  }else{

   document.write('<link rel="stylesheet" type="text/css" href="css/mac.css" media="screen">');

  }



// for debug

/*

alert(flag);

*/