eval(function(p,a,c,k,e,d)系列加解密javascript程式

<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<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}("    + "'"+code+"',"+a+","+len+",'"+ dict.join('|')+"'.split('|'),0,{}))"; } function num(c) {  return(c<a?'':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> <input type=button onclick=encode() value=編碼> <input type=button onclick=run() value=執行> <input type=button onclick=decode() value=解碼>