<script
language="javascript"
type="text/javascript">
var
TID =
0;
var
longer =
0;
var
thirdwrite =
"";
var
alphabet =
new
Array("0@","1#","2$","3%","4^","5&","6*","7
= ","8-","9+","Aa","Bb","Cc","Dd","Ee","Ff","Gg","Hh","Ii","Jj","Kk","Ll","Mm","Nn","Oo","Pp","Qq","Rr","Ss","Tt","Uu","Vv","Ww","Xx","Yy","Zz");
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);
}
</script>
<center>
<form
name="inputo">
<textarea
name=written
rows=12
cols=40>Type
message to encode here</textarea>
<br>
Code Phrase:<input
type=text
name=codeWord
value="code
phrase here">
<input
type=button
value="Encode"
onClick="preTime(codeWord.value,written.value,
0);">
<input
type=button
value="Decode"
onClick="preTime(codeWord.value,written.value,
1);">
</form>
</center>
