js实现把中文、英文标点转换

<SCRIPT   LANGUAGE="JavaScript">   
  <!--   
  function   meizz(str)   
  {   
      var   tmp   =   ‘‘;   
      for(var   i=0;i<str.length;i++)   
      {   
          tmp   +=   String.fromCharCode(str.charCodeAt(i)+65248)   
      }   
      return   tmp   
  }   
  alert(meizz(‘abcdefghijklmnopqrstuvwxyz1234567890‘));   
  alert(meizz(‘~`!@#$%^&*()_+|-={}[]:";<>?,./\\\‘‘));   
  //-->   
  </SCRIPT>