js文件加密与解密

jQuery的加密方法：

<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 != t) dict.push(t = tmp);

}

var len = dict.length;

var ch;

for(i=0; i<len; i++) {

   ch = num(i);

   code = code.replace(new RegExp('\\b'+dict+'\\b','g'), ch);

   if(ch == dict) dict = '';

}

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><br>

<input type=button onclick=encode() value=编码>

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

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