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CaesarEncryption.html by Chaim #10

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CaesarEncryption.html
Mar 18, 2018
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CaesarEncryption.html
Mar 18, 2018
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179 changes: 179 additions & 0 deletions CaesarEncryption.html
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Original file line number Diff line number Diff line change
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<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
<title>Caesar Encryption</title>
</head>

<body>
<style>
form {
width: 500px;
height: 600px;
background: #dddddd;
border: 1px solid black;

}

#left {
width: 50%;
height: 60px;
background: #cccccc;
border: 2px solid black;
font-size: 16px;
margin: 0;
}

#left:hover {
background: #039cc2;
}

#right {
width: 50%;
height: 60px;
background: #cccccc;
border: 2px solid black;
font-size: 16px;
margin: 0;
}

#right:hover {
background: #039cc2;
}

.c1 {
width: 500px;
height: 60px;
display: flex;
flex-direction: row
}

.c2 {
margin-left: 5px;
margin-top: 50px;
height: 75px;
}

#intxt {
border: 1px solid black;
width: 200px;
}

#outtxt {
border: 1px solid black;
width: 200px;
}

#but {
width: 150px;
height: 50px;
margin-left: 100px;
}
</style>

<form>
<div class="c1">
<button id="left" type="button" onclick="leftOn()"><b>Encryption</b></button>
<button id="right" type="button" onclick="rightOn()"><b>Decryption</b></button>
</div>
<div>
<div class="c2">
<label>Key [1-25] :</label>
<input id="key" type="number" min="1" max="25" step="1" value="1">
</div>
<div class="c2">
<label>Input: </label>
<input id="intxt" type="text" name="input" placeholder="Enter your text">
</div>
<div class="c2">
<button id=but type="button" onclick="foo()"></button>
</div>
<div class="c2">
<label>Output: </label>
<input id="outtxt" type="text" disabled>
</div>
</div>


<script>
function foo() {

switch (document.getElementById('but').innerHTML) {
case "Encrypt":
encrypt();
break;
case "Decrypt":
decrypt();
break;
default:
alert("CRYPT");
}
}
function leftOn() {
document.getElementById('right').style.background = "#cccccc";
document.getElementById('right').style.color = "black";
document.getElementById('left').style.background = "#000099";
document.getElementById('left').style.color = "#ffffff";
document.getElementById('but').innerHTML = "Encrypt";

}

function rightOn() {
document.getElementById('left').style.background = "#cccccc";
document.getElementById('left').style.color = "black";
document.getElementById('right').style.background = "#000099";
document.getElementById('right').style.color = "#ffffff";
document.getElementById('but').innerHTML = "Decrypt";
}

function encrypt() {
var str = document.getElementById('intxt').value;
document.getElementById('intxt').value = "";
document.getElementById('outtxt').value = rShift(str, document.getElementById('key').value);
document.getElementById('key').value = "1";
}

function rShift(txt, k) {
var str = "";
for (i = 0; i < txt.length; i++) {
if ((txt.charCodeAt(i) + parseInt(k)) > 126) {
// alert(txt.charCodeAt(i)+parseInt(k));
str += String.fromCharCode(((txt.charCodeAt(i) + parseInt(k)) - 95));
}
else {
// alert(txt.charCodeAt(i)+parseInt(k));
str += String.fromCharCode(txt.charCodeAt(i) +parseInt(k));
}
}
return str;
}

function decrypt() {
var str = document.getElementById('intxt').value;
document.getElementById('intxt').value = "";
document.getElementById('outtxt').value = lShift(str, document.getElementById('key').value);
document.getElementById('key').value = "1";
}

function lShift(txt, k) {
var str = "";
for (i = 0; i < txt.length; i++) {
if ((txt.charCodeAt(i) - parseInt(k)) < 32) {
// alert(txt.charCodeAt(i)-parseInt(k));
str += String.fromCharCode(((txt.charCodeAt(i) - parseInt(k)) + 95));
}
else {
// alert(txt.charCodeAt(i)-parseInt(k));
str += String.fromCharCode(txt.charCodeAt(i) - parseInt(k));
}
}
return str;
}
</script>

</form>
</body>

</html>