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JavaScript code encryption and decryption code

Source: Internet
Author: User
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<! Doctype HTML public "-// W3C // dtd html 4.0 transitional // en">
<HTML>
<Head>
<Title> new document </title>
<Meta name = "generator" content = "editplus">
<Meta name = "author" content = "">
<Meta name = "keywords" content = "">
<Meta name = "Description" content = "">
</Head>

<Body>
<SCRIPT>
A = 62;
Function encode (){
VaR code = Document. getelementbyid ('code'). value;
Code = code. Replace (/[\ r \ n] +/g ,'');
Code = code. Replace (/'/g ,"\\'");
VaR TMP = code. Match (/\ B (\ W +) \ B/G );
TMP. Sort ();
VaR dict = [];
VaR I, T = '';
For (VAR I = 0; I <TMP. length; I ++ ){
If (TMP [I]! = T) dict. Push (t = TMP [I]);
}
VaR Len = dict. length;
VaR ch;
For (I = 0; I <Len; I ++ ){
Ch = num (I );
Code = code. Replace (New Regexp ('\ B' + dict [I] + '\ B', 'G'), ch );
If (CH = dict [I]) dict [I] = '';
}
Document. getelementbyid ('code '). value = "eval (function (P, A, C, K, E, D) {e = function (c) {return (C <? '': E (parseint (C/A) + (C = C % A)> 35? String. fromcharcode (C + 29): C. tostring (36)}; If (! ''. Replace (/^/, string) {While (c --) d [E (c)] = K [c] | E (C ); k = [function (e) {return d [e]}]; E = function () {return '\\\ W +'}; C = 1 }; while (c --) if (K [c]) P = P. replace (New Regexp ('\\\\ B' + E (c) + '\\\\ B', 'G'), K [c]); return p }("
+ "'" + Code + "'," + A + "," + Len + ", '" + dict. join ('|') + "'. split ('|'), 0 ,{}))";
}

Function num (c ){
Return (C <? '': Num (parseint (C/A) + (C = C % A)> 35? String. fromcharcode (C + 29): C. tostring (36 ));
}

Function run (){
Eval (document. getelementbyid ('code'). value );
}

Function decode (){
VaR code = Document. getelementbyid ('code'). value;
Code = code. Replace (/^ eval /,'');
Document. getelementbyid ('code'). value = eval (CODE );
}
</SCRIPT>

<Textarea id = Code Cols = 80 rows = 20>

</Textarea> <br/>
<Input type = button onclick = encode () value = encoding/>
<Input type = button onclick = run () value = Execution/>
<Input type = button onclick = decode () value = decoding/>
</Body>
</Html>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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