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

<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=编码> 

<input type=button onclick=run() value=执行> 

<input type=button onclick=decode() value=解码>