Cкрипт, выдирающий из реферера поисковый запрос

function referrer_keyword_parser() {
var patterns =
   [
     [ /^http:\/\/([a-z]+\.)?google\.(co\.)?[a-z]+/, /q=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?yahoo\.(co\.)?[a-z]+/, /p=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?search\.msn\.(co\.)?[a-z]+/, /q=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?search\.live\.(co\.)?[a-z]+/, /q=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?search\.aol\.(co\.)?[a-z]+/, /q=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?search\.ask\.[a-z]+/, /q=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?search\.lycos\.(co\.)?[a-z]+/, /query=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?digg\.com/, /s=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?rambler\.[a-z]+/, /query=([^&]+)/ ],
     [ /^http:\/\/([a-z]+\.)?yandex\.[a-z]+/, /text=([^&]+)/ ]
   ]

      var p;
      for ( var k in patterns) {
              p = patterns[k]
              if (document.referrer.match(p[0])) {
                      var m = document.referrer.match(p[1]);
                      if (m.length)
                       return m[1];
                      else
                       break;
              }
      }
  return escape("type-your-default-keyword-here");
}

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