function justEnglish() {

          var inString = $("in").get("value");

          var strict = false;
          if ($("strict").checked) strict = true;

          var outString = "";
          var character = "";
          for (a = 0; a <= inString.length; a++) {
            newChar = "";
            character = inString.charAt(a);

            if ((character >= "0" && character <= "9") ||
                (character >= "A" && character <= "Z") ||
                (character >= "a" && character <= "z")) newChar = character;

            if (strict == false && (character == " " || character == "," ||
                character == "-" || character == "." || character == "_")) newChar = "_";

            if (character == "Ö") newChar = "o";
            if (character == "Ü") newChar = "u";
            if (character == "Ó") newChar = "o";
            if (character == "Ő") newChar = "o";
            if (character == "Ú") newChar = "u";
            if (character == "É") newChar = "e";
            if (character == "Á") newChar = "a";
            if (character == "Ű") newChar = "u";
            if (character == "Í") newChar = "i";

            if (character == "ö") newChar = "o";
            if (character == "ü") newChar = "u";
            if (character == "ó") newChar = "o";
            if (character == "ő") newChar = "o";
            if (character == "ú") newChar = "u";
            if (character == "é") newChar = "e";
            if (character == "á") newChar = "a";
            if (character == "ű") newChar = "u";
            if (character == "í") newChar = "i";
            
            // nem lehet dupla aláhúzás
            if (newChar == "_" && lastChar == "_") {
              continue;
            } else {
              outString += newChar;
            }

            lastChar = newChar;

        }
        $("out").set("value", outString.toLowerCase());

      }
      window.addEvent("load", function() {
		  if ($("in").get("value")!="") { justEnglish(); }
          $("in").addEvent("keyup", justEnglish);
          $("strict").addEvent("click", justEnglish);
          $("in").focus();
      });