function StripAt(str)
{
   var res, pos, atstr;

   res = str;

   var arrAtStr = new Array ("(zavinac)", "%28zavinac%29");

   for(i=0;i<arrAtStr.length;i++){

   	   atstr = arrAtStr[i];

	   pos = res.indexOf(atstr);

	   while (pos>=0) {

		   res = res.substring(0, pos) + "@" +
		      res.substring(pos+atstr.length, res.length);
		   pos = res.indexOf(atstr);
	   }
   }

   return res;
}