eval(function(p,a,c,k,e,d)系列解密javascript程序_javascript技巧

　　2.把加密的代码粘进文本域，点击解密，OK!

核心代码：
代码如下:

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; iif(tmp[i] != t) dict.push(t = tmp[i]);
}
var len = dict.length;
var ch;
for(i=0; ich = 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(c35?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(c35?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);
}

<p>

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(c35?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(c35?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>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]