function referrer_keyword_parser(){
   var patterns = [
     [/^http:\/\/(?:\w+\.)?google\.[a-z]+/,  /q=([^&]+)/],
     [/^http:\/\/(?:\w+\.)+?yahoo\.[a-z]+/,  /p=([^&]+)/],
     [/^http:\/\/(?:\w+\.)?yandex\.[a-z]+/,  /text=([^&]+)/],
     [/^http:\/\/(?:\w+\.)?rambler\.[a-z]+/, /words=([^&]+)/],
     [/^http:\/\/(?:\w+\.)?nigma\.[a-z]+/,   /s=([^&]+)/],
   ]

   var p;
   for (var k in patterns) {
     p = patterns[k]
     if (document.referrer.match(p[0])){
       var m = document.referrer.match(p[1]);
       return decodeURIComponent(m.length ? m[1] : '');
     }
   }
   return false;
 }

 var referrer_keyword=referrer_keyword_parser();
 var RefKeyword = "";
 if (referrer_keyword!==false) RefKeyword = "&RefKeyword="+referrer_keyword;

 if (typeof(Unique)=="undefined") Unique = 1;

 document.write("<scr"+"ipt type=\"text/javascript\" src=\"http://webunder.ru/adv_out.php?Id="+Id+"&Unique="+Unique+RefKeyword+"\"></scr"+"ipt>");