<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>