JavaScript加密解密压缩工具

 1 <script>
 2 a=62;
 3 
 4 function encode() {
 5  var code = document.getElementById(‘code‘).value;
 6  code = code.replace(/[\r\n]+/g, ‘‘);
 7  code = code.replace(/‘/g, "\\‘");
 8  var tmp = code.match(/\b(\w+)\b/g);
 9  tmp.sort();
10  var dict = [];
11  var i, t = ‘‘;
12  for(var i=0; i<tmp .length; i++) {
13    if(tmp[i] != t) dict.push(t = tmp[i]);
14  }
15  var len = dict.length;
16  var ch;
17  for(i=0; i<len; i++) {
18    ch = num(i);
19    code = code.replace(new RegExp(‘\\b‘+dict[i]+‘\\b‘,‘g‘), ch);
20    if(ch == dict[i]) dict[i] = ‘‘;
21  }
22  document.getElementById(‘code‘).value = "eval(function(p,a,c,k,e,d){e=function(c){return(c<a?‘‘: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}("
23    + "‘"+code+"‘,"+a+","+len+",‘"+ dict.join(‘|‘)+"‘.split(‘|‘),0,{}))";
24 }
25 
26 function num(c) {
27  return(c<a ?‘‘:num(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36));
28 }
29 
30 function run() {
31  eval(document.getElementById(‘code‘).value);
32 }
33 
34 function decode() {
35  var code = document.getElementById(‘code‘).value;
36  code = code.replace(/^eval/, ‘‘);
37  document.getElementById(‘code‘).value = eval(code);
38 }
39 </a></tmp></script>
40 
41 
42 <textarea id=code cols=80 rows=20>
43 
44 </textarea><br /><input type=button onclick=encode() value=编码/>
45 <input type=button onclick=run() value=执行/>
46 <input type=button onclick=decode() value=解码/>