timeago a jQuery plugin Japanese enhancement

timeago_japanese.js

function convertWithLang(timeAgo, lang) {  
  if (lang == "ja")
    return toJa(timeAgo);
  
  return timeAgo;
}

function convert(timeAgo, dict, strip) {
  var delim = " ";
  var arr = timeAgo.split(delim);
  if (strip)
    delim = "";

  return jQuery.map(arr, function(key, i) {
    var replace = dict[key];
    return replace ? replace : key;
  }).join(delim);
}

function toJa(timeAgo) {
  var dict = {
    "about":      "約",
    "a":          "1",
    "an":         "1",
    "minute":     "分",
    "minutes":    "分",
    "hour":       "時間",
    "hours":      "時間",
    "ago":        "前",
    "day":        "日",
    "days":       "日",
    "month":      "月",
    "months":     "月",
    "year":       "年",
    "years":      "年"
  };
  
  toJa = function(str) {
    if (str == "less than a minute")
      return "1分未満";
    return convert(str, dict, true);
  }
  
  return toJa(timeAgo);
}