ascii encryption (js source.com)

<!--

Script Name:  ASCII Encryption

Website URL:  http://javascript.internet.com/passwords/ascii-encryption.html

Description:  (Internet Explorer Only) A very simple encryption method that uses
random values for each character. Interestingly, you can encrypt the same string
as many times as you want and the result will always be different. Best used
with short strings.

-->


<!-- TWO STEPS TO INSTALL ASCII ENCRYPTION:

  1.  Copy the coding into the HEAD of your HTML document
  2.  Add the last code into the BODY of your HTML document  -->

<!-- STEP ONE: Paste this code into the HEAD of your HTML document  -->

<HEAD>

<SCRIPT LANGUAGE="JavaScript">
<!-- Original:  David Salsinha (david.salsinha@popsi.pt) -->

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

<!-- Begin
function Encrypt(theText) {
output = new String;
Temp = new Array();
Temp2 = new Array();
TextSize = theText.length;
for (i = 0; i < TextSize; i++) {
rnd = Math.round(Math.random() * 122) + 68;
Temp[i] = theText.charCodeAt(i) + rnd;
Temp2[i] = rnd;
}
for (i = 0; i < TextSize; i++) {
output += String.fromCharCode(Temp[i], Temp2[i]);
}
return output;
}
function unEncrypt(theText) {
output = new String;
Temp = new Array();
Temp2 = new Array();
TextSize = theText.length;
for (i = 0; i < TextSize; i++) {
Temp[i] = theText.charCodeAt(i);
Temp2[i] = theText.charCodeAt(i + 1);
}
for (i = 0; i < TextSize; i = i+2) {
output += String.fromCharCode(Temp[i] - Temp2[i]);
}
return output;
}
//  End -->
</script>
</HEAD>

<!-- STEP TWO: Copy this code into the BODY of your HTML document  -->

<BODY>

<center>
<form name=encform onsubmit="return false;">
<textarea name=box1 rows=5 cols=50>The quick brown fox jumps over the lazy
dog</textarea>
<p>
<input type=button value="Encrypt Box1 to Box2"
onClick="this.form.box2.value=Encrypt(this.form.box1.value);">
<p>
<textarea name=box2 rows=5 cols=50></textarea>
<p>
<input type=button value="Decrypt Box2 to Box3"
onClick="this.form.box3.value=unEncrypt(this.form.box2.value);">
<p>
<textarea name=box3 rows=5 cols=50></textarea>
</form>
</center>

<p><center>
<font face="arial, helvetica" SIZE="-2">Free JavaScripts provided<br>
by <a href="http://javascriptsource.com">The JavaScript Source</a></font>
</center><p>

<!-- Script Size:  1.83 KB -->