Kod:
<!-- THREE STEPS TO INSTALL SIMPLE ENCODER-DECODER:
1. Copy the coding into the HEAD of your HTML ********
2. Add the onLoad event handler into the BODY tag
3. Put the last coding into the BODY of your HTML ******** -->
<!-- STEP ONE: Paste this code into the HEAD of your HTML ******** -->
<HEAD>
<style type="text/css">
<!--
.smaller {
font-size: .7em;
}
-->
</style>
<script type="text/javascript">
<!-- Begin
/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
Created by: Kaushal K. Prasad :: http://www.geocities.com/mekaushal/ */
//*** THIS IS A HELP MESSAGE FUNCTION AND MUST NOT BE CHANGED ***
function help() {
var m1,m2,m3,m4,m5,h;
h=" __________ Encoder - Decoder Help __________\n\n";
m1="1) Enter text in the top text area."
m2="2) Press [ Encode ] button to encode it. Encoded text will appear in the middle text area."
m3="3) Copy the encoded text and send/mail it to your friend."
m4="4) He must enter the encoded text in the bottom text area and press [Decode] to see original message."
m5="5) He can use the same method to send/mail any message to you."
alert(h+m1+"\n"+m2+"\n"+m3+"\n"+m4+"\n"+m5);
}
//*** HELP MESSAGE FUNCTION ENDS HERE ***//
var i,j;
var getc;
var len;
var num,alpha;
num=new Array("01","02","03","04","05","06","07","08","09","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","00","##","$$");
/* BE CAREFUL, ADD NEW ITEM OF ONLY TWO CHARACTERS IN THE ARRAY ABOVE
YOU CAN CHANGE THE ITEMS ABOVE ACCORDINGLY YOURSELF,
BUT EACH ITEM SHOULD OF TWO CHARACTERS ONLY */
alpha=new Array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"," ",".",",");
//********** ENCODER FUNCTION STARTS HERE ***********
function encode() {
len=********.f1.ta1.value.length;
********.f1.ta2.value="";
for(i=0;i<len;i++) {
getc=********.f1.ta1.value.charAt(i);
getc=getc.toLowerCase();
for(j=0;j<alpha.length;j++) {
if(alpha[j]==getc) {
********.f1.ta2.value+=num[j];
}
}
}
}
//*******ENCODER FUNCTION ENDS HERE*******
//********* DECODER FUNCTION STARTS HERE *********
function decode() {
len=********.f1.ta2.value.length;
********.f1.ta3.value="";
for(i=0;i<len;i++) {
getc=********.f1.ta2.value.charAt(i)+********.f1.ta2.value.charAt(i+1);
i=i+1;
for(j=0;j<num.length;j++) {
if(num[j]==getc) {
********.f1.ta3.value+=alpha[j];
}
}
}
}
//******* DECODER FUNCTION ENDS HERE *******
// End -->
</script>
</HEAD>
<!-- STEP TWO: Insert the onLoad event handler into your BODY tag -->
<BODY onload="javascript:********.f1.ta1.select();">
<!-- STEP THREE: Copy this code into the BODY of your HTML ******** -->
<div align="center">
<form name="f1">
Enter the text to be encoded below<br>
<span class="smaller">(Numbers and special characters not allowed )</span>
<br>
<textarea cols="35" rows="5" name="ta1"></textarea><br>
<input type="button" name="b1" value=" Encode " onclick="encode();"> <input type="reset" value=" Reset ">
<br><br>
Encoded text is below<br>
<textarea cols="35" rows="5" name="ta2" readonly></textarea><br>
<input type=button value="Highlight All" onClick="javascript:this.form.ta2.focus();this.form.ta2.select();"> <span class="smaller">... then click CTRL+c</span>
<br><br>
Enter the text to be decoded below<br>
<textarea cols="35" rows="5" name="ta3"></textarea><br>
<input type="button" name="b1" value=" Decode " onclick="decode();"> <input type="reset" value=" Reset ">
<br><br>
<span class="smaller"><a href="http://www.geocities.com/mekaushal/">Kaushal K. Prasad</a> :: <a href="javascript:help();">Click for Help!</a></span>
</form>
</div>
<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: 4.21 KB -->