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Chloe Fontenot 🏳️‍⚧️
2023-03-14 08:51:55 -05:00
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Chapter ZIPs/JavaScript/ch04/greg/greg_encoder.html Executable file
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>Greg's Gambits | Secret Message Encoder</title>
<link href="greg.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
function encodeIt()
{
document.getElementById("message").innerHTML = ("<h2>&nbsp;</h2>");
var msg= prompt("Enter your message." , " ");
var newmsg = " ";
var upCaseCode = 155;
var newCode = 0;
var lowCaseCode = 219;
var specialCode = 3;
//the loop encodes each letter in the message string
for (var j = 0; j < msg.length; j++)
{
//check for upppercase letters and encode them
if ((msg.charCodeAt(j) >= 65) && (msg.charCodeAt(j) <= 90))
{ newcode = (upCaseCode - msg.charCodeAt(j)); }
else
//check for lowercase letters and encode them
if ((msg.charCodeAt(j) >= 97) && (msg.charCodeAt(j) <= 122))
{ newcode = (lowCaseCode - msg.charCodeAt(j)); }
else
//check for numbers and special characters and encode them
if (((msg.charCodeAt(j) > 90) && (msg.charCodeAt(j) < 97)) || (msg.charCodeAt(j) < 65))
{ newcode = (msg.charCodeAt(j) + specialCode); }
//add each encoded character to the new message
newmsg = newmsg + " " + String.fromCharCode(newcode);
}
//display the encoded message on the web page
document.getElementById("secret").innerHTML = ("<h2>" + newmsg + "</h2>");
//decide if original message should be shown
var choice = prompt("Do you want the original message displayed? Yes or No?", " ");
if ((choice.charAt(0) == 'y') || (choice.charAt(0) == 'Y'))
{
document.getElementById("message").innerHTML = ("<h2>" + msg + "</h2>");
}
}
</script>
</head>
<body>
<div id="container">
<img src="images/superhero.jpg" width="120" height="120" class="floatleft" />
<h1 id="logo"><em>The Secret Message Encoder</em></h1>
<p>&nbsp;</p>
<div id="nav">
<p><a href="index.html">Home</a>
<a href="greg.html">About Greg</a>
<a href="play_games.html">Play a Game</a>
<a href="sign.html">Sign In</a>
<a href="contact.html">Contact Us</a></p>
</div>
<div id="content">
<h2>Write A Message and Encode It</h1>
<p><input type="button" id="encode" value="Enter your message" onclick="encodeIt();" /></p>
<table cellpadding="2" width = "90%" align = "center" border="1">
<tr> <td align="center" id="secret"><p>encoded message</p></td> </tr>
<tr> <td align="center" id="message">&nbsp;</td> </tr> </table>
</div>
<div id="footer">Copyright &copy; 2013 Greg's Gambits<br />
<a href="mailto:yourfirstname@yourlastname.com">yourfirstname@yourlastname.com</a>
</div>
</div>
</body>
</html>