js 判断浏览器使用的语言

<script type="text/javascript"> 
  var language = navigator.browserLanguage?navigator.browserLanguage:navigator.language;
  alert(language);
  if (language.indexOf('en') > -1) document.location.href = 'english.htm'; 
  else if (language.indexOf('nl') > -1) document.location.href = 'dutch.htm'; 
  else if (language.indexOf('fr') > -1) document.location.href = 'french.htm'; 
  else if (language.indexOf('de') > -1) document.location.href = 'german.htm'; 
  else if (language.indexOf('ja') > -1) document.location.href = 'japanese.htm'; 
  else if (language.indexOf('it') > -1) document.location.href = 'italian.htm'; 
  else if (language.indexOf('pt') > -1) document.location.href = 'portuguese.htm'; 
  else if (language.indexOf('es') > -1) document.location.href = 'Spanish.htm'; 
  else if (language.indexOf('sv') > -1) document.location.href = 'swedish.htm'; 
  else if (language.indexOf('zh') > -1) document.location.href = 'chinese.htm'; 
  else 
  document.location.href = 'english.htm'; 
  </script>