js加密得到cookie，求改写

Question

 js：<script>var x="return@17@challenge@253@false@function@_phantom@Nov@8@for@45@l@GMT@f@if@window@Mon@16@new@cd@t@addEventListener@x@setTimeout@catch@captcha@3970957548@07@join@cookie@chars@1478515517@0xFF@length@1@replace@rOm9XFMtA3QKV7nYsPGT4lifyWwkq5vcjH2IdxUoCbhERLaz81DNB6@g@0xEDB88320@while@RegExp@c@document@e@charCodeAt@0@rN6tiiAm4qHmvqIKlAodhur4@charAt@Path@dc@href@split@d@Expires@1500@3D@__phantomas@var@i@11@JgSe0upZ@try@location@__jsl_clearance@DOMContentLoaded@else@attachEvent@onreadystatechange".replace(/@*$/,"").split("@"),y="14 c=6(){E(g.7||g.13){};14 k,O='1a=w.4|K|';k=(6(){14 n=[K],15,G,l='',v='17%B',e=6(G){a(14 15=K;15<9;15++)G=(G&z)?(D^(G>>>z)):(G>>>z);1 G};E(l=n.t().A(j F('\\\\R+','C'),6(R){1 v.M(R)}).Q(',').t('')+'L%12'){G=-z;a(15=K;15<l.y;15++)G=(G>>>9)^e((G^l.J(15))&x);f(r===(G^(-z))>>>K)1 l;15=K;E(++n[15]===v.y){n[15++]=K;f(15===n.y)n[15]=-z}}})();O+=k;o('19.P=19.P.A(/[\\?|&]q-3/,\\'\\')',11);H.u=(O+';10=h, s-8-i 16:b:2 d;N=/;');};f((6(){18{1 !!g.m;}p(I){1 5;}})()){H.m('1b',c,5);}1c{H.1d('1e',c);}",z=0,f=function(x,y){var a=0,b=0,c=0;x=x.split("");y=y||99;while((a=x.shift())&&(b=a.charCodeAt(0)-77.5))c=(Math.abs(b)<13?(b+48.5):parseInt(a,36))+y*c;return c},g=y.match(/\b\w+\b/g).sort(function(x,y){return f(x)-f(y)}).pop();while(f(g,++z)-x.length){};eval(y.replace(/\b\w+\b/g, function(y){return x[f(y,z)-1]}));</script>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
得到cookie：__jsl_clearance=1478515517.253|0|j6GrN6tiiAm4qHmvqIKlAodhur4%3D

Answer 1

http://bbs.csdn.net/topics/392039382