JavaScript DHTML/Security/Unescape
Unescape Encoder/Decode
<source lang="html4strict">
<html>
<head>
<title>Unescape Encoder/Decoder</title>
<script language="javascript">
var encN=1;
function decodeTxt(s){
var s1=unescape(s.substr(0,s.length-1));
var t="";
for(i=0;i<s1.length;i++)t+=String.fromCharCode(s1.charCodeAt(i)-s.substr(s.length-1,1));
return unescape(t);
}
function encodeTxt(s){
s=escape(s);
var ta=new Array();
for(i=0;i<s.length;i++)ta[i]=s.charCodeAt(i)+encN;
return ""+escape(eval("String.fromCharCode("+ta+")"))+encN;
}
function escapeTxt(os){
var ns="";
var t;
var chr="";
var cc="";
var tn="";
for(i=0;i<256;i++){
tn=i.toString(16);
if(tn.length<2)tn="0"+tn;
cc+=tn;
chr+=unescape("%"+tn);
}
cc=cc.toUpperCase();
os.replace(String.fromCharCode(13)+"","%13");
for(q=0;q<os.length;q++){
t=os.substr(q,1);
for(i=0;i<chr.length;i++){
if(t==chr.substr(i,1)){
t=t.replace(chr.substr(i,1),"%"+cc.substr(i*2,2));
i=chr.length;
}}
ns+=t;
}
return ns;
}
function unescapeTxt(s){
return unescape(s);
}
function wF(s){
document.write(decodeTxt(s));
}
</script>
</head>
<body bgcolor="#FFFFFF" alink="#C0C0C0" link="#C0C0C0" vlink="#C0C0C0">
<form name="fA">
Decoded
<textarea id="f1" cols=50 rows=10 wrap="off"></textarea>
<input type="button" width="50%" value="Encode" onclick="document.fA.c1.value=escapeTxt(document.fA.f1.value)">
<input type="button" value="Decode" onclick="document.fA.f1.value=unescapeTxt(document.fA.c1.value)">
Encoded
<textarea id="c1" cols=50 rows=10></textarea>
This can be used with the unescape( ); function in JavaScript.
</form>
</body>
</html>
</source>
