有什么工具能把JS代码压缩成下面这样子？又有什么办法可以把压缩成下面这样的代码还原（还原大概的）
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}('A 1b=1W;A 2a=0;A 2R=1;A 2Q=2;A 24=9;A 22=6;A 2S=1W;A 2V=2U;A Y;A V;A 1u=J;A 1K;A 1s,2P;A 1n;A 1k;A Z;A 1q;A P;A 1l;A X,1C;A U,1i;A 1w;A 1E;A 1X=E O(2O,2J,2I,2H,2K,2L,2M,2X,3e,3g,3a,2Z,2Y,2G,38,37,1Z);A 1I=E O(3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,2f,2i,2j,2m,2l,1p,2k,2c,2n,2F,2o,2z,0,0);A 1F=E O(0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,1p,1p);A 1J=E O(1,2,3,4,5,7,9,13,17,25,33,2D,2x,2w,2r,2q,1t,3h,2T,2A,2h,2g,2y,2E,36,2u,2v,2t,2s,2p);A 1L=E O(0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13);A 1G=E O(16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15);S 1O(){D.1N=J;D.1y=J}S 1M(){D.e=0;D.b=0;D.n=0;D.t=J}S 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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}('A 1b=1W;A 2a=0;A 2R=1;A 2Q=2;A 24=9;A 22=6;A 2S=1W;A 2V=2U;A Y;A V;A 1u=J;A 1K;A 1s,2P;A 1n;A 1k;A Z;A 1q;A P;A 1l;A X,1C;A U,1i;A 1w;A 1E;A 1X=E O(2O,2J,2I,2H,2K,2L,2M,2X,3e,3g,3a,2Z,2Y,2G,38,37,1Z);A 1I=E O(3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,2f,2i,2j,2m,2l,1p,2k,2c,2n,2F,2o,2z,0,0);A 1F=E O(0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,1p,1p);A 1J=E O(1,2,3,4,5,7,9,13,17,25,33,2D,2x,2w,2r,2q,1t,3h,2T,2A,2h,2g,2y,2E,36,2u,2v,2t,2s,2p);A 1L=E O(0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13);A 1G=E O(16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15);S 1O(){D.1N=J;D.1y=J}S 1M(){D.e=0;D.b=0;D.n=0;D.t=J}S 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<title>Javascript Packer Decoder</title>
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<h1>Javascript Packer Decoder</h1>
<div id="PackerDecoder">
<textarea id="code" cols="80" rows="20"></textarea><br />
<input type="button" id="encode" value="加密" />
<input type="button" id="runcode" value="执行" />
<input type="button" id="decode" value="解码" />
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jsCode = jsCode.replace(/'/g, "\\'");
var tmp = jsCode.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]);
}
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var len = dict.length;
var ch;
for (i = 0; i < len; i++) {
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1，只取出所有多余空白和注释的压缩工具，保留所有有意义的代码
2.取出空白注释，而且修改变量名以减小代码的压缩器
3。完成以上两种工作，而且最小化代码中所有单词长度，不仅仅是变量名。
jsMin
Packer 可以看看。