<SCRIPT LANGUAGE="JavaScript">   
<!-- Original: Francisco Ryan Tolmasky (iopossum@mailcity.com) -->   
<!-- Web Site: http://iopossum.tripod.com -->   

<!-- This script and many more are available free online at -->   
<!-- The JavaScript Source!! http://javascript.internet.com -->   

<!-- Begin   
var TID = 0;   
var longer = 0;   
var thirdwrite = "";   
var alphabet = new Array("0@","1#","2$","3%","4^", "5&", "6*", "7 = ","8-", "9+", "Аа", "Бб", "Вв", "Гг", "Дд", "Ее", "Жж", "Зз", "Ии", "Кк", "Лл", "Мм", "Нн", "Оо", "Пп", "Рр", "Сс", "Тт", "Уу", "Фф", "Хх", "Ъъ", "Цц", "Чч", "Ьь", "Шш", "Щщ", "Ыы", "Ээ", "Юю", "Яя", "Йй");   
function preTime(coco, uinput, question) {   
longer = coco.length - 1;   
placement = 0;   
ref = 0 ;   
secondWrite = "";   
firstWrite = "";   
thirdWrite = "";   
code1(coco, uinput, longer, question);   
}   
function findshift(letter) {   
for (i = 0; i < 36; i++) {   
if ((alphabet[i].substring(0,1) == letter) || (alphabet[i].substring(1,2) == letter)) {   
if (alphabet[i].substring(0,1) == letter) {   
x = 0;   
}   
if (alphabet[i].substring(1,2) == letter) {   
x = 1;   
}   
return i;   
}   
}   
}   
function check(letter) {   
bill = "no";   
for (i = 0; i < 36; i++) {   
if ((alphabet[i].substring(0,1) == letter) || (alphabet[i].substring(1,2) == letter)) {   
bill = "yes";   
}   
}   
if (bill == "yes") {   
return true;   
}   
else {   
return false;   
}   
}   
function fixoffset(takin) {   
if (takin > 35) {   
return (takin - 36);   
}   
else {   
return takin;   
}   
}   
function code1(inval1,inval2,inval3,sage) {   
if (check(inval2.charAt(placement))) {   
if (check(inval1.charAt(ref))) {   
if (sage == 0) {    
shift = findshift(inval1.charAt(ref));   
}   
if (sage == 1) {    
shift = 36 - findshift(inval1.charAt(ref));   
}   
}   
else {   
shift = 0;   
}   
orig = findshift(inval2.charAt(placement));   
firstWrite = firstWrite+alphabet[fixoffset(orig+shift)].charAt(x);   
}   
else {   
firstWrite = firstWrite+inval2.charAt(placement);   
}   
secondWrite = inval2.substring(placement+1,inval2.length+1);   
thirdWrite = firstWrite+secondWrite;   
document.inputo.written.value = thirdWrite;   
placement++;   
if (ref == inval3) {   
ref = 0   
}   
else {   
ref++;   
}   
if (placement == (inval2.length)) {   
window.clearTimeout(TID);   
return false;   
}   
one = inval1;   
two = inval2;   
three = inval3;   
goer = sage;   
TID = window.setTimeout("code1(one, two, three, goer)", 0);   
}   
// End -->   
</script>   
<center>   
<form name="inputo">   
<textarea name=written rows=12 cols=40>Напечатайте здесь лсообщение, требующее кодирования</textarea>   
<br>   
</font>   
<font color="#000000" size="2">Кодовая фраза :<input type=text name=codeWord value="кодовая фраза здесь">   
<input type=button value="Закодировать" onClick="preTime(codeWord.value,written.value, 0);" style="font-size: 8pt; font-family: Arial">   
<input type=button value="Раскодировать" onClick="preTime(codeWord.value,written.value, 1);" style="font-size: 8pt; font-family: Arial">   
</form>   
</center>