<html><head><script language=javascript>
function encode (text,letters) {
coded=''; i=0;
do {
coded+=letters.charAt(((letters.indexOf(text.charAt(i))+((i==0)?-1:letters.indexOf(coded.charAt(i-1))))+letters.length)%letters.length);
} while (text.charAt(++i)!='');
return coded;
}
function decode (text,letters) {
decoded=''; number=0; i=0;
do {
difference=(letters.indexOf(text.charAt(i))-((i==0)?-1:letters.indexOf(text.charAt(i-1)))+letters.length)%letters.length;
decoded+=letters.charAt(difference);
} while (text.charAt(++i)!='');
return decoded;
}
function translate(which) {
chars='';
with (document.forms[0]) {
chars=list.value
+((newline.checked)?"\n":"")
+((carriagereturn.checked)?"\r":"")
+((quotes.checked)?"\"":"")
+((tab.checked)?"\t":"")
+((backslash.checked)?"\\":"");
if (which=="encode") {
crypt.value=encode(plain.value,chars);
plain.value='';
}
else {
plain.value=decode(crypt.value,chars);
crypt.value='';
}
}
}
</script>
</head>
<body>
<form action="javascript:" name="blah">
<table><tr>
<td align=center><input type=button onClick="translate('encode')" value="Encrypt"></td>
<td align=center><input type=button onClick="translate('decode')" value="Decrypt"></td>
</tr><tr>
<td align=center><textarea rows=20 cols=40 name=plain></textarea></td>
<td><textarea rows=20 cols=40 name=crypt></textarea></td>
</tr><tr><td colspan=2>
<input type=text name=list
value="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ 1234567890`~!@#$%^&*()_-=+{[}]|:;'<,>.?/" size=100>
</td></tr><tr><td><input type=checkbox name=newline>Newline
</td><td><input type=checkbox name=carriagereturn checked>Carriage Return</td></tr>
<tr><td><input type=checkbox name=quotes checked>Double Quotes
</td><td><input type=checkbox name=tab checked>Tab</td></tr>
<tr><td><input type=checkbox name=backslash checked>Backslash</td></tr></table></form></body></html>