var browser;
if ((navigator.userAgent.indexOf(" Opera ") != -1)||(navigator.userAgent.indexOf("Opera/") != -1)) {
  if (navigator.platform.indexOf("Mac") != -1) {
    browser='mac-opera';
  } else {
    browser='win-opera';
  }
} else if (navigator.platform.indexOf("Mac") != -1) {
  if (navigator.userAgent.indexOf("Safari/") != -1) {
    browser='mac-safari';
  } else if (navigator.appVersion.indexOf('MSIE') != -1) {
    browser='mac-ie';
  } else if (navigator.userAgent.indexOf("Gecko/") != -1) {
    browser='mac-gecko';
  } else if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4)) {
    browser='mac-ns';
  } else {
    browser='mac-unknown';
  }
} else if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
  if (navigator.appVersion.indexOf('MSIE 6') != -1) {
    browser='win-ie6';
  } else {
    browser='win-ie';
  }
} else if (navigator.userAgent.indexOf("Gecko/") != -1) {
    browser='win-gecko';
} else if ((navigator.appName == "Netscape") && (parseInt(navigator.appVersion) >= 4)) {
    browser='win-ns';
} else {
    browser='win-unknown';
}
/*
var cssfile='';
switch(browser){
  case 'mac-safari':
  case 'mac-ie':
  case 'mac-gecko':
  case 'mac-opera':
  case 'mac-unknown':
  case 'mac-ns':
  case 'win-ie':
  case 'win-ie6':
  case 'win-opera':
  case 'win-gecko':
  case 'win-unknown':
  case 'win-ns':
  default:
    cssfile='css/font.css';break;
}
if ('' != cssfile) d.write('<link rel="stylesheet" href="'+cmndir+cssfile+'" type="text/css" media="screen,print" />');
*/